You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my reservation due to heavy rains at my destination place, so please help me.

ASSISTANT: Yes, I am happy to help you. Please wait for a while, I will check your reservation status and let you know.

USER: Sure, I am Donald Lee.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Donald Lee, I have cancelled your reservation. Thank you for choosing us and have a nice day.