You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: My name is Timothy Lopez. I want to change my existing reservation due to heavy rainfall.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Not an issue, thanks for your service.

ASSISTANT: Thank you for opting us.