Hello, Emily Walker here.
Hello Emily. How can I aid you today?
 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?
Sure, I will help you Emily, let me check is there any  reservation available or not.
Ok, take your own time.
No previous reservation found on your name Emily Walker.
That's ok.
 Do you need anything else from us to help you?
No. Thank you.
Thank you for reaching us, have a great day.