You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Turner.

ASSISTANT: What service that you are seeking from our agency?

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, I am glad to help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no reservation with your name in our database.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thank you for your information.

ASSISTANT: Welcome.