You are a flight assistant. 
 USER: Hello,. I am Paul Mitchell.

ASSISTANT: Hello, how may I serve you today?

USER: We are planning to celebrate the nature festival with my friend in Washington to explore the nature. Will you help me in booking my ticket?

ASSISTANT: Sure, can you please provide your journey dates?

USER: I want to depart on 11/. I want to depart on 11/30 and return on 12/02.

ASSISTANT: May I know your source and destination points?

USER: My source code is AZ-PHX and destination code is DC-IAD.

ASSISTANT: Do you have any connection limit?

USER: I need a halt.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We found a flight with UA airlines, flight number is 1017 with one connection and price is 200.

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thanks for choosing us.