You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I am Jason Walker. I want to cancel my recent reservation due to heavy rainfall.

ASSISTANT: Ok, I will help you in that. Please, wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting. I could not find any reservation on your name.

USER: No problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your service.