You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Nancy Green. Due to an emergency case, I need a flight ticket to travel to Boston to deal an important case. Can you please help me in flight ticket booking?

ASSISTANT: Sure, I am glad to help you with the ticket booking. Will you please share your departure and arrival dates?

USER: Thank you for your response and my journey dates are 11/25 and return back on 11/27.

ASSISTANT: Ok, which airports are nearest to your desired locations?

USER: Sure, BOS and BOS because it a round trip. So, these are my nearest airport codes.

ASSISTANT: Ok, will you please provide me sometime to check the available flight tickets in this route?

USER: Ok, I don't mind to wait. Take your time.

ASSISTANT: There is a flight available which is having a few number of ticket in this, the airline is UA which is having a connection limit 1 and the price is 200. Shall I proceed with ticket booking?

USER: I am ok with the flight and the fare, you can proceed with booking.

ASSISTANT: Ok, I have reserved your ticket with this flight airlines and the flight number is 103.

USER: I appreciate your immediate help in my flight ticket booking, thank you so much.

ASSISTANT: Sorry, suddenly the flight number is changed to 1003.

USER: It's alright.

ASSISTANT: You are most welcome. Thank you for consulting our agency.

USER: Welcome.