Hello.
user
Hello. How can I aid you today?
assistant
Owing to an emergency, I want to cancel my recent reservation. Can  you help me?
user
Sure, I am here to help you. May I know the name on which the ticket has been reserved?
assistant
Thank you. Yes, I am John Williams.
user
Sorry John, there are no flights reserved on your given name.
assistant
Ok, not an problem. Thank you for your information.
user
Welcome, thank you for choosing us. Have a great day.
assistant