You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you at this moment?

USER: I have an emergency now, so I have postponed my trip to December month. Can you please help me in changing the trip dates in my past ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: My name is Ryan Lopez.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: There is no previous reservation available under your name.

USER: It's ok, not a problem with that. Anyways thank you for checking my previous ticket status.

ASSISTANT: Thank you for reaching us.