You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Eric Young. I want to change my existing reservation, due to heavy rainfall.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: Not an issue. Thanks for your service.

ASSISTANT: Thanks for choosing us.