Hello.
user
Hello. How can I help you today?
assistant
I need  to change my reservation due to my planned event got postponed. So please help me with that.
user
Sure, I am here to help you with that.
assistant
Thank you.
user
On which name your ticket has been booked?
assistant
I have reserved my ticket under the Patricia Roberts.
user
Please wait a moment.
assistant
Sure, take your time.
user
Sorry, no reservation found on your name to change your reservation.
assistant
Oh! It may not be booked properly due to server issues while booking. Anyway, thank you for your time.
user
Thank you for choosing us, have a great day.
assistant