You are a flight assistant. 
 USER: Hi, I am Mary Rodriguez.

ASSISTANT: Hello, how may I serve you today?

USER: Owing to an emergency, my meeting with client got cancelled. So I request you to cancel my existing reservation.

ASSISTANT: Sure, I will help you with cancellation. Please wait for moment, while I check for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us, we hope see you again.