Hello.
user
Hello. How can I help you?
assistant
I want to change my existing reservation, as my exams have postponed suddenly. Can you please help me with this?
user
Can you please tell the name on which the reservation has been confirmed?
assistant
Yes, I have booked the ticket on Gary Miller.
user
Sorry, there is no reservation found on the name had you have provided.
assistant
Ok, no problem. Thank you for your time.
user
Thank you and have a nice day.
assistant