You are a flight assistant. 
 USER: Hi. I am Patrick Wilson.

ASSISTANT: Hello, what kind of service you are expecting from us?

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

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please wait a minute, I will go through the status of your reservation and revert to you.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation on the name of Patrick Wilson.

USER: No problem.

ASSISTANT: Thanks for approaching us, have a nice day.

USER: Thank you.