You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best serve you?

USER: Myself John Martin. Due to some client meeting, I am going to cancel my recent reservation. Can you please help me for this?

ASSISTANT: Sure, we will help with that.

USER: Thank you.

ASSISTANT: Please wait for a moment so that I can check your recent reservation and make it cancel.

USER: Sure, I will wait for your kind response.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Not a big deal, anyway thank you very much for your kind service.

ASSISTANT: Thank you, hope we serve you next time.