You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Gary Carter.

ASSISTANT: How can I aid you?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, please wait for a minute. I will check in the reservation list and revert to you.

USER: Ok, take your time.

ASSISTANT: Sorry Gary Carter, there is no reservation found with your name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thanks for approaching us.