You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, in what way may I help you out?

USER: Due to the sudden change in climate, my meeting with client has been postponed.

ASSISTANT: Ok.

USER: So I have a request to you to change my existing reservation?

ASSISTANT: Can I have your name please?

USER: Sure, I had a recent reservation with name Jacob Moore.

ASSISTANT: Ok, wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We found that there was no reservation with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: I appreciate your kind service.