You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from BOS to PHL.

ASSISTANT: OK, please let me know your dates of travelling?

USER: My travelling dates are 09/19 and 09/21.

ASSISTANT: Thank you, do you have any limits?

USER: Yes,the flight should be with 1 connection and the price should be with in 200.

ASSISTANT: Thank you for your details, let me know your name for further process?

USER: I am Margaret Lopez.

ASSISTANT: I have found a flight-1000 of Southwest airline, which matches all your requirements. Shall I proceed?

USER: Oh! that's really good,please proceed my booking.

ASSISTANT: Thank you for confirming, your ticket is booked. Hope you have a happy journey.

USER: Thank you.