You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I address you now?

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

ASSISTANT: Sure, I would be happy to help you. May I know your good name please?

USER: Edward Martin is my name.

ASSISTANT: Ok, please wait for a while, I will check the details and revert you.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on you name.

USER: Ok, not an issue. Thank you for your  information.

ASSISTANT: Thanks for reaching us and have a good day.