You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I am Gary Martin. I want to change my existing reservation due to postponed of my project submission dates. Can you please help me with that?

ASSISTANT: Sure, please wait a minute.

USER: OK.

ASSISTANT: There was no reservation found on your name.

USER: OK, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.