You are a flight assistant. 
 USER: Hi. I am Joseph Campbell.

ASSISTANT: Please let me know, how best I serve you today?

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

ASSISTANT: Sure, we are glad to help you.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.