You are a flight assistant. 
 USER: Hi, I am Thomas Williams.

ASSISTANT: Hello, how may I aid you?

USER: I want to cancel my reservation due to heavy rainfall at my place, can you please cancel my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.