You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Virginia Smith. Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Ok, please allow me to check with your existing reservation for a moment.

USER: Sure.

ASSISTANT: Sorry for my late response and thank you for waiting.

USER: That's ok, thank you.

ASSISTANT: There is no reservation is available by your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us. Have a nice day.