You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for this day?

USER: I am David Scott.

ASSISTANT: Ok.

USER: I am planning to visit Phoenix Zoo in PHX. Can you help me in booking a ticket from BOS?

ASSISTANT: Ok, may I know your trip dates?

USER: My travel dates are from 12/29 to 12/31.

ASSISTANT: Here is a flight with price 200 and Frontier is ticket airlines.May I proceed.

USER: That's good to hear. Please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: You are welcome.