You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Edwards.

ASSISTANT: How can I serve you at this moment?

USER: Due to some bad weather conditions my meeting place was changed, so I am requesting to change my existing reservation.

ASSISTANT: Sure, please wait a minute, Let me check with your existing reservation status.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our records.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.