You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Jackson.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, I am here to help you out.

USER: Ok.

ASSISTANT: Mary Jackson, we regret to inform you that there is no reservation found on your name in our records.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.