You are a flight assistant. 
 USER: Hello. I am Jennifer Miller.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found with your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.