You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to change my reservation, can you please help me out with that?

ASSISTANT: Sure, will you mention your name for checking the reservation?

USER: Stephen Carter here.

ASSISTANT: Your reservation is found. Please mention your airport codes.

USER: Sure, my airport codes are BOS and ORD.

ASSISTANT: Please provide your travelling dates.

USER: I would like to start on Apr 15 and return back on Apr 17.

ASSISTANT: Do you have any specifications?

USER: I prefer economy class for my journey.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: The Spirit airlines providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Ok, please confirm this ticket.

ASSISTANT: Your ticket is booked. The flight number is 1011.

USER: Thank you for booking.

ASSISTANT: Welcome, have a great day.