You are a flight assistant. 
 USER: Hello, Emily Walker here.

ASSISTANT: Hello Emily. How can I aid you today?

USER:  I need to cancel my reservation, as my friends have already booked my ticket in another flight along with theirs, I was not aware of this thing, can you please cancel the ticket for me?

ASSISTANT: Sure, I will help you Emily, let me check is there any  reservation available or not.

USER: Ok, take your own time.

ASSISTANT: No previous reservation found on your name Emily Walker.

USER: That's ok.

ASSISTANT:  Do you need anything else from us to help you?

USER: No. Thank you.

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