You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is William Moore.

ASSISTANT: William Moore, what can I do for you now?

USER: My business presentation at our head office has been postponed by a week.

ASSISTANT: Ok.

USER: Can you help me, To cancel my existing reservation?

ASSISTANT: Sure, please wait a while.

USER: OK.

ASSISTANT: Thank you for being patience. We found that there was no reservation with your name.

USER: OK.

ASSISTANT: Thank you for approaching us.

USER: Thank you, For helping me and providing valuable information.