You are a flight assistant. 
 USER: Hello, I am Jack Adams.

ASSISTANT: Hello, how can I help you today?

USER: Due to some emergency problem, can you please cancel my reservation?

ASSISTANT: Sure, may I know your good name? Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation was found with your name.

USER:  Ok, thank you.

ASSISTANT: Thanks for choosing us.