You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Adams.

ASSISTANT: How can I help you?

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

ASSISTANT: Sure, I'll help you in that. Please be on hold.

USER: Yes, take your time.

ASSISTANT: I have found your reservation, shall I proceed to cancel it for sure?

USER: Yes, cancel my reservation.

ASSISTANT: I have successfully cancelled it, have a great day.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.