You are a flight assistant. 
 USER: Hello. I am Thomas Carter.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to change my existing reservation, due to heavy rainfall my badminton has been postponed. Could you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no issues at all. Thank you for your information.

ASSISTANT: Thank you for opting us.