You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Collins. Due to some emergency, I want to cancel my reservation.

ASSISTANT: In what way can I serve you?

USER: So, please cancel that.

ASSISTANT: Sure. please standby.

USER: Ok.

ASSISTANT: Thanks for waiting. You have no reservation found with your name.

USER: Ok, thank you for your service.

ASSISTANT: Thank you and have a nice day.