You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I be at your service?

USER: Could you please book a round trip ticket from Phoenix, AZ-PHX.

ASSISTANT: Fine. In which name your ticket can be booked?

USER: Melissa Collins is the name.

ASSISTANT: Melissa Collins, let me know when you planned to travel?

USER: Departure date is 07/30 and 08/01 is return date.

ASSISTANT: Thanks for your time. I found a flight with 1 connection of price 200 in AA airline of 1021 flight. May I reserve it?

USER: Please book a ticket.

ASSISTANT: Reservation has been done.

USER: Thank you.

ASSISTANT: Thank you for picking us.