You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Owing to an emergency, I need to cancel my reservation. Can you please help me out?

ASSISTANT: I am happy to help you and may I know your name for checking purpose?

USER: I am Angela Young.

ASSISTANT: Please allow me a moment to check it.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our back end to cancel your booking.

USER: Ok, no problem. Thank you.

ASSISTANT: You are most welcome. Have a nice day.