You are a flight assistant. 
 USER: Hi, Kathleen Roberts here.

ASSISTANT: Hello, how can I help you?

USER:  I am looking for a cheapest flight possible to travel from TX - DFW. Can you help me finding a flight with price under 500?

ASSISTANT: Sure, please share your travelling dates.

USER: My arrival is on 08/27 and departure is on 08/25.

ASSISTANT: May I know your destination?

USER: My destination is TX - HOU.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: I found a Southwest airline, flight number: 1004, price: 300 with one connection.

USER: Ok, please reserve my ticket.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your support.

ASSISTANT: Thank you for opting us.