You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is George Collins.

ASSISTANT: What can I do for you today?

USER: Could you do me a favour in cancelling my recent reservation?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Ok.

ASSISTANT: Hold on for a moment.

USER: Ok.

ASSISTANT: I tried to cancel your reservation, but there is no reservation is found in our data base.

USER: It's ok.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Welcome. Thank you for choosing us.