You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you 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, I will help you with that. Will you please mention the name for checking the reservation?

USER: Thank you, my name is Sarah Smith.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Oh! It's ok no problem. Thank you for your service.

ASSISTANT: Welcome, have a great day.