You are a flight assistant. 
 USER: Hello, Katherine Johnson here.

ASSISTANT: Hello Katherine Johnson, how can I help you?

USER: I have planned to visit my sister's engagement in Chicago, so could you please help me to book a flight from BOS to ORD?

ASSISTANT: Sure Katherine, I can book a ticket for you. Can I know your dates?

USER: My preferable dates are from 01/12 to 01/14. Make sure that the flight should contain 1 connection and the price is with in the limits of 500. Can you please search for it?

ASSISTANT: I found a flight with Delta airlines to your region, should I proceed to book the ticket?

USER: May I know your flight number?

ASSISTANT: Katherine, the flight number is 1021.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has booked Katherine, happy journey.

USER: Thank you for booking my ticket.

ASSISTANT: Its our pleasure.