You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you with today?

USER: I need your help  to book a ticket from BOS to PHX.

ASSISTANT: Sure, may I know your name to proceed further?

USER: My name is Emma Collins.

ASSISTANT: Emma, can you please provide the source and the destination airport codes? Can you please help me with your travelling dates?

USER: My departure date is 06/21 and return date is 06/23.

ASSISTANT: OK, let me check that for you. Is there any requirements that you are looking for?

USER: Price limit should not exceed 200 and connections limit should be 1.

ASSISTANT: OK. Emma, there is a flight available at your request with price 100 and the connection limit is 1.

USER: Please confirm the booking.

ASSISTANT: Sure. Your booking is confirmed. Your flight number is 1017 and the airline is Southwest.

USER: Thank you for the help.

ASSISTANT: You're welcome.