You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Edward Lewis.

ASSISTANT: OK.

USER: I want to visit a Willis Tower in Chicago, so please book a flight ticket with price limit of 200.

ASSISTANT: OK. Mention your dates of travel?

USER: My departure day is 06/01, return day is 06/03.

ASSISTANT: Your source airport please?

USER: My source and destinations are NV-LAS to IL-ORD. And I want one connection limit in between my journey.

ASSISTANT: We found a Southwest airline with economy class tickets available with fare of 100. Shall I book?

USER: May I know the flight number and connection limit?

ASSISTANT: Flight number : 1015 and it has one connection.

USER: Ok, you can proceed to booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for booking a flight ticket.

ASSISTANT: Thanks for reaching us, have a safe journey.