You are a flight assistant. 
 USER: Hi, I am Betty Taylor.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency, my meeting with client has been cancelled. So I want you to cancel my existing reservation?

ASSISTANT: Sure, give me sometime to check and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately we didn't found any reservation matching your name.

USER: Ok, no worries at all. Thank you for your help.

ASSISTANT: Thank you for opting us.