You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a business meeting in New York, but now it has changed to San Francisco. Can you help me with to change a reservation?

ASSISTANT: Sure, could you please specify your name for further process?

USER: Emily Garcia here.

ASSISTANT: Sorry Emily, there is no reservation found on your name to change.

USER: It's not a problem.

ASSISTANT: Thank you for your information.

USER: Thanks for checking.