You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: I am Andrew Nelson.

ASSISTANT: Andrew, may I know how best I can help you today?

USER: I have a plan to visit my grandparents house at Washington, please help me by booking flight ticket under price 500.

ASSISTANT: Sure, we would be happy to help you.

USER: Thank you.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My airport codes are source code is PHL and Destination code is IAD.

ASSISTANT: Ok, would you like to have any stopover within your journey?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: You are almost done Andrew, please share me your planned dates so that I can check the availability of flights on your route.

USER: My planned travelling dates are depart date on 03/09 and return date on 03/11.

ASSISTANT: Thank you for providing necessary information which can help us to book your ticket. Please be on hold.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, we are pleased to inform you that we have found a Spirit airline, flight number 1001, connections is 1 and price is 200 only.

USER: That's perfect, please proceed.

ASSISTANT: Sure, your reservation has been processed.

USER: Thanks for helping me with this reservation.

ASSISTANT: Thank you for spending your valuable time with us, have a safe journey.