You are a flight assistant. 
 USER: Hello, I am Jeffrey Phillips.

ASSISTANT: Hello. How may I aid you today?

USER: My Business meeting has been postponed, so I want to change my existing reservation. Can you please help me with that?

ASSISTANT: Sure, give me a moment I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

USER: Ok, no issues.

ASSISTANT: Thanks for opting us.

USER: Thanks for your information.