Hello.
user
Hello. How may I help you out?
assistant
Due to personal work, I want to change my reservation. Can you help me?
user
Sure, I will help you in changing the ticket.  May I know your name please?
assistant
I am Brenda Garcia.
user
Sorry, there are no reservations found.
assistant
No issue, Thanks for the valuable information.
user
Thank you for reaching us.
assistant