You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Gary Collins, want to alter my recent reservation due to some personal issue. Please help me out with that.

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your specified name.

USER: It's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.