You are a flight assistant. 
 USER: Hello, I am Jonathan Smith.

ASSISTANT: Hello, how can I assist you?

USER: Can you please change my existing reservation due to postponed of my project submission dates?

ASSISTANT: Sure Smith, please wait a moment.

USER: OK.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: OK, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the information.