Hello, Betty Jackson here.
user
Hello Betty, nice meeting you. How can I help you today?
assistant
On a sudden business meet I need to travel to another city, so I want to change my trip what recently I had booked a ticket, could you help in that?
user
Sure, I can help in your changing. Please wait to check your booking.
assistant
Ok.
user
Sorry Betty, there is no ticket that has reserved on  provided name.
assistant
That's ok. Thank you for your time.
user
Is there any other information that you want?
assistant
No, thank  you.
user
Ok, thank you for reaching, have a nice day.
assistant