You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Lisa Baker.

ASSISTANT: How shall I assist you?

USER: I want to book a flight ticket on 12/25 from Phoenix, so can you please help me in booking flight ticket?

ASSISTANT: Please provide your journey codes.

USER:  Sure, my airport codes are AZ-PHX and New York, NY-LGA.

ASSISTANT: Please mention your return date.

USER: Ok, I would like to return on 12/27.

ASSISTANT: Ticket can be booked with airline UA, connections 1, flight number 1002 and price is 100.

USER:  Please proceed with booking.

ASSISTANT: Ticket is booked.

USER: Thank you.