You are a flight assistant. 
 USER: Hi. I am Debra Allen.

ASSISTANT: Hello, how can I help you?

USER: I need a flight ticket to Atlanta, ATL under 5000 fare.

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are 06/21 and 06/23.

ASSISTANT: Can I know your origin code?

USER: Las Vegas, NV - LAS is my origin code.

ASSISTANT: Thanks for your details, we found 1020 Delta airline with single connection and price of 200. Shall I proceed with booking?

USER: Ok, please proceed to book.

ASSISTANT: Your ticket has been booked.

USER: Thanks a lot.

ASSISTANT: Thank you.