You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: My business meeting got postponed, can you please help me in changing the reservation?

ASSISTANT: Please share your name to proceed for booking?

USER: I am Susan Brown.

ASSISTANT: No reservation found as per your preferences.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.