You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: Sarah Harris here.

ASSISTANT: Welcome to flight booking agency Sarah.

USER: I would like to meet my college friend in Detroit, so could you please book a ticket from DCA to DTW?

ASSISTANT: Sure, I will help you. Can you please provide your preferable dates of travelling?

USER: Sure, I am flying from 12/19 to 12/21.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok, I will wait.

ASSISTANT: Based on your information, I have found a flight with 2 connections with the fare of 200. Is it ok for you?

USER: Please I need 1 connection flight.

ASSISTANT: Ok, please be on hold. I have found a flight with single stop over in your journey with a minimum fare of 200 is provided by Southwest airlines. Shall I proceed with this?

USER: Ok, book it.

ASSISTANT: Sure, your ticket has been confirmed in flight number 1010.

USER: Thank you for your response.

ASSISTANT: Thank you for approaching us, have a great journey.