You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my existing reservation, as my meeting was being postponed to next month. Can you please help me in changing my reservation?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thanks a lot for accepting my request..

ASSISTANT: Please share your name to check your previous reservation status.

USER: My name is Jeffry Clark.

ASSISTANT: Ok, please give me a moment.

USER: Ok, sure.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Ok, not a problem. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.