You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Williams.

ASSISTANT: How may I help you out?

USER: I want to cancel my reservation due heavy rainfall at my place.

ASSISTANT: Ok. Please wait for sometime, I will check with the reservation list.

USER: Ok.

ASSISTANT: Thanks for waiting, no cancellation can be done, because your name is not in the reservation list. Thanks for reaching us, have a great day.

USER: Ok, thank you.