You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I need to cancel my reservation because my friends have already booked my ticket in another flight I was not aware of this thing, so can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Larry Phillips.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you for your service.