You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My interview has been postponed, I want to change my existing reservation. Can you please change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, I am Catherine Anderson.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thanks for choosing us.