据我查证，我总结出“约谈”在三种英语语境下的不同表述，分别是：例句1的法律法规中；例句2的新闻报道中，以及例句3的银行业务中。

1. conduct face-to-face talks

例句：

省级以上人民政府有关部门在履行网络安全监督管理职责中，发现网络存在较大安全风险或者发生安全事件的，可以按照规定的权限和程序对该网络的运营者的法定代表人或者主要负责人进行约谈。网络运营者应当按照要求采取措施，进行整改，消除隐患。

Where provincial-level or higher People’s Governments’ relevant departments, in the process of carrying out their cybersecurity supervision and management duties, discover that relatively large security risks exist online or they discover security incidents, they may, according to the provided powers and procedures, conduct face-to-face talks with the statutory representative or main responsible persons of network operators. Network operators shall adopt measures, rectify the situation and eliminate danger according to requirements.（来源：《网络安全法》第五十六条 中英对照版）

2. summon sb. for a meeting

例句：

交通运输部联合公安部以及北京市、天津市交通运输、公安部门，针对“8月24日浙江省温州市女孩乘坐滴滴顺风车途中被害”事件，对滴滴公司开展联合约谈，责令其立即对顺风车业务进行全面整改。

The Ministry of Transport, the Ministry of Public Security and related agencies in Tianjin, where Didi Chuxing is registered, summoned senior executives of Didi Chuxing for a face-to-face meeting and ordered the company to rectify problems with its online hitch riding services, enhance security measures and release timely updates of its progress to correct the situation with the public.（来源：新华网）

8月26日，交通运输部、公安部以及滴滴出行公司注册地天津市的相关部门对该公司高管进行面对面约谈，责令其立即对顺风车业务进行全面整改，加强安全举措，及时向社会公布有关整改情况。

“Summon someone for a meeting”在这里就是“约谈某人”的意思，除此之外，summon还可以表示“（法庭）传唤”，比如，He was summoned to court for traffic violation./He received a court summon for traffic violation.此外，summon还可以表示“鼓起（勇气）、振作（精神）”的意思，常用的搭配是summon the courage to do something（鼓起勇气做某事），比如：It took him three months to summon the courage to tell her that he likes her.（他用了三个月才鼓起勇气向她表白。）

3. regulatory talks

China's central bank has held regulatory talks with some banks and non-bank payment platforms, urging them to stop providing services for virtual-currency speculation.

近日中国人民银行约谈部分银行和支付机构，要求不得为虚拟货币交易炒作提供服务。

On 21 June 2021, People's Bank ofChina held regulatory talks withsome banks and payment platforms including. （来源： China Daily）