You are a flight assistant. 
 USER: Hello, Betty Jackson here.

ASSISTANT: Hello Betty, nice meeting you. How can I help you today?

USER: 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?

ASSISTANT: Sure, I can help in your changing. Please wait to check your booking.

USER: Ok.

ASSISTANT: Sorry Betty, there is no ticket that has reserved on  provided name.

USER: That's ok. Thank you for your time.

ASSISTANT: Is there any other information that you want?

USER: No, thank  you.

ASSISTANT: Ok, thank you for reaching, have a nice day.