You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you today?

USER: Due to bad weather, I decided to cancel my reservation, can you help me in that?

ASSISTANT: Sure. May I know your name?

USER: I am William Lewis.

ASSISTANT: Ok William Lewis. Wait for a moment I will check and revert you back.

USER: Ok.

ASSISTANT: Thanks for being patient, we found not find any reservation by your name. Thank you for choosing us.

USER: Ok, Thanks for your service.