You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Lewis.

ASSISTANT: How can I help you?

USER: I planned a trip to New York but because of financial issues, I want to change my reservation.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you and have a nice day.