You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Edward Brown.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you.