You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you out?

USER: I want to change my existing reservation due my change in movie schedule.

ASSISTANT: Ok.

USER: Can you can help me out in changing my reservation?

ASSISTANT: Sure, to change your route, I need your name.

USER: I am Catherine Wilson.

ASSISTANT: Thanks for sharing your name, but no reservation is existed with your name.

USER: Ok, not a problem.

ASSISTANT: Thanks for opting us.

USER: Thanks for sharing the information.