You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name please?

USER: Thank you for your response, my name is Rebecca Campbell.

ASSISTANT: Wait a while, kindly.

USER: Ok.

ASSISTANT:  Sorry, there is no reservation found for the user name in our back end to cancel it.

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

ASSISTANT: Thank you for opting us.