You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Owning to an emergency, I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Sure, my name is Frank Moore.

ASSISTANT: Frank, wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, no reservation has been found on your name in our database.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing our service.

USER: Thank you for your information.