Hello.
user
Hello, how may I help you today?
assistant
I had booked a flight ticket in the name Betty Jackson. But as my leaves is not  been approved  I want to cancel my ticket, can you help me?
user
Sure, please wait for a moment. I will help you in this.
assistant
Ok, take your time.
user
Sorry Betty, there is no reservation found on your name to cancel your reservation.
assistant
That's ok, thank  you for your aid.
user
You are welcome.
assistant