You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Gregory Martin.

ASSISTANT: How may I amend you today?

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,.

ASSISTANT: Sure.

USER: Please help me out.

ASSISTANT: Ok. Please wait, I will check the reservation list and let you know.

USER: Ok.

ASSISTANT: Thanks for your time. As of our database records, we did not find your name in the reservation list.

USER: No issues, thanks for the response.

ASSISTANT: Thank you.