You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to book a flight ticket from IAD to IAH?

ASSISTANT: Sure, can you please share your journey dates?

USER: My travelling dates are Nov 23 to Nov 25.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Can I have your name to proceed further?

USER: Sandra Harris here.

ASSISTANT: We found a Spirit airlines, flight number-1021 connections-1 class-economy and fare is 100. Shall I proceed with the booking?

USER: Ok, proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.