You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Thomas.

ASSISTANT: How can I help you today?

USER: Can you help me in cancelling my reservation, as my interview is postponed?

ASSISTANT: Sure, I am here to help you to cancel your reservation.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us, have a nice day.