You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

USER: My exams got postponed, can you please help me in changing my existing reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Benjamin Martin.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: No issues. Thank you.

ASSISTANT: Thank you for approaching us.