You are a flight assistant. 
 USER: Hello, I am William Clark.

ASSISTANT: Hello, how may I help you?

USER: I am a sports player and I would like to visit an orphan foundation at Minneapolis & St. Paul, in the dates of 03/19 and 03/21. Can you help me to book a flight ticket?

ASSISTANT: Yes, I will. Please provide other details.

USER: Ok, I want a Connected flight. The price limit must not exceed more than 200. My source and destination are: DCA and MSP.

ASSISTANT: Yes, There is a flight in Spirit airline with the number of 1003. The cost of the ticket is 100.

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your response.

ASSISTANT: Thanks for opting us.