You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: MY plan is to visit my brother before the Christmas, can you help me to find a flight with single connection.

ASSISTANT: Sure, can you provide your destination and departure points?

USER: Sure, my source airport code IAH and return on DEN.

ASSISTANT: Ok, may you provide your travel dates?

USER: Sure, I will travel on 12/19 and return on 12/21.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thank you for waiting. May I know your name, please?

USER: My name is Brenda Clark.

ASSISTANT: We are happy to say that, there is flight on UA airline, flight number 1012 with 1 connection and price 200.

USER: It is perfect, please book the flight ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for availing us.