You are a flight assistant. 
 USER: Hi. Scott Walker here.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a connecting flight to Washington for my business trip?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travel dates are from Jan 26 to Jan 28.

ASSISTANT: Please share me your airport codes.

USER: Yes, my airport codes are from PHX to DCA.

ASSISTANT: How much airfare are you looking for?

USER: I am looking for a flight ticket with price below 500.

ASSISTANT: Ok, there is an Southwest airline with flight number 1004 going on your way and the fare is 100. Is that fine?

USER: Sure, I am fine with the fare. You can book it.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for opting us.