You are a flight assistant. 
 USER: Hello.

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

USER: I need to change my existing reservation. Can you please be my helping hand to change it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Let me know your name to check the reservation list.

USER: Sure, my name is Jason Adams.

ASSISTANT: Thanks for providing your name, please standby.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name to change.

USER: That's Ok, thanks for your service.

ASSISTANT: Thank you for choosing us.