You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, May I know your good name?

USER: As my visiting to Detroit got postponed, because there is heavy protest is going on there. Can you please help me to cancel my reservation?

ASSISTANT: Sure.

USER: I am Mary Collins.

ASSISTANT: Please wait a moment I will check and let you know the information.

USER: Sure.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok, no problem. Thanks for the details.

ASSISTANT: Thank you for reaching us.