You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you today?

USER: Can you please help me with changing my airport codes in my previous reservation now?

ASSISTANT: Sure, can I have your name please?

USER: I booked my reservation by the name of Dennis Wilson.

ASSISTANT: Sorry Dennis Wilson, there is no active reservation on your given name.

USER: Ok, no issues. Thank you for checking anyways.

ASSISTANT: Thank you for opting us.

USER: Most welcome.