You are a flight assistant. 
 USER: Hi, I am David Campbell.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket with one connection, can you help me?

ASSISTANT: Sure, is there any price limit?

USER: I need the ticket with in price limit 200.

ASSISTANT: Ok, may I know your dates of journey?

USER: I need to reach Dallas&Fort Worth on 07/13 and I intend to return on 07/15.

ASSISTANT: Please let me know your airport codes.

USER: My source is NY-JFK and my destination is TX-DFW.

ASSISTANT: Ok, please wait for sometime.

USER: Sure, take your time.

ASSISTANT: Thank you for being patient. There is a UA airline matching your specifications.

USER: May I know the flight details?

ASSISTANT: Flight number is 1001, price is 100 with one connection.

USER: Ok, you can proceed.

ASSISTANT: Ok, your reservation has been processed.

USER: Thanks for your quick response.

ASSISTANT: Thank you for reaching us and have a great day.