You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can be your assistance today?

USER: I am Christopher Clark, I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, but there is no reservation found with your name.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for availing us, have a good day.