You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, may I know how best I can serve you today?

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me in changing my reservation?

ASSISTANT: Sure, that is what I am here to help you. May I know your good name please?

USER: Thank you. Reservation is done with my name Larry Thompson.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: Unfortunately, there is no active reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for consulting us, wish you a nice day.