You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am looking a flight with airfare of 1000 limit, can you help me out?

ASSISTANT: Ok, can you please provide me your name?

USER: My name is Helen Mitchell.

ASSISTANT: Ok Helen, can you provide me your travelling dates?

USER: My preferable travel dates are from 12/01 till 12/03.

ASSISTANT: May I know your airport codes that you want to fly?

USER: My location airport codes are from DCA and LGA.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your patience.

USER: My pleasure.

ASSISTANT: You have a flight with flight number 1000 with one connection, would you like to proceed with this flight?

USER: Please, proceed with it.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our services.

USER: Welcome.