You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Ronald Jones.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Ronald Jones, we haven't found any reservation under your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.