You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I am happy to help you. Can I have your good name to proceed further?

USER: I am Nancy Allen.

ASSISTANT: Sorry, there is no active reservation on your name in our data.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.