You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please reserve a seat from Washington, IAD?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I am starting a new mobile company at Boston. So, I have to go there on 11/07. I will return on 11/09.

ASSISTANT: Can you please provide your take off airport code?

USER: I will start from Washington, IAD.

ASSISTANT: Destination airport code?

USER: Boston, BOS is landing point.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT:  Thanks for waiting, we are pleased to inform you that we have found a Frontier airline, flight number-1014 connections-1 and price limit is 300.

USER: Do not proceed, because I need a ticket with a price of 200.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thanks for reaching us.