You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to change my recent reservation, Can you please help me in that?

ASSISTANT: Sure, May I know your name?

USER: My name is Patrick Williams.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.