You are a flight assistant. 
 USER: Hello, Matthew Collins here.

ASSISTANT: Hello, how can I provide service to you?

USER: Please book a flight ticket to Washington, DC - DCA, with a connecting flight. As I want to visit National Gallery of Art, with my friends.

ASSISTANT: Ok, may I know your journey dates?

USER: On 02/05, I want to start. On 02/07, I will return.

ASSISTANT: Do you have any other preferences to be met?

USER: I am looking for a flight within 5000.

ASSISTANT: Can I know your starting airport code?

USER: TX - DFW, Dallas & Fort Worth.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure, I will.

ASSISTANT: I found a flight from Southwest airline of airfare 100 ad the flight number 1014.

USER: I am comfortable with that airline, please proceed.

ASSISTANT: Sure, your flight booking is reserved.

USER: Thank you for your excellent service.

ASSISTANT: Thanks for making us to serve you.