You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Michael Taylor here. Can you book a connecting flight to Washington for my business trip?

ASSISTANT: Sure, may I know the codes of airport you want to travel?

USER: My airport codes for boarding the flight are PHX to IAD. My price limit is less than 200.

ASSISTANT: Ok, please mention your preferred dates to travel?

USER: My travelling dates for journey are 12/24 to 12/26.

ASSISTANT: Ok, there is a flight 1001 in Spirit airline matching your details with price 200. Shall I proceed?

USER: You can book it.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome.