You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket on dates Dec 17 and Dec 19?

ASSISTANT: Let me know your airport codes?

USER:    My airport codes LGA and PHX.

ASSISTANT: Do you have any preference?

USER:    I need a economy class ticket.

ASSISTANT: Can I know your name?

USER: My name is George Williams.

ASSISTANT: Found ticket with airline JetBlue for price 200 having flight number 1001.

USER: Please proceed with booking.

ASSISTANT: Ticket is booked.

USER: Thank you for the help.