You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me to book a flight from HOU to DCA?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel  dates please?

USER: Sure, I want to travel on Oct 31 and need to return on Nov 2.

ASSISTANT: Ok, please let me know your preferable timings of your journey.

USER: I am ok with any flight.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Can I have your good name please?

USER: Angela Allen.

ASSISTANT: UA airlines running a flight in your  route with connection 1 and the ticket fare is 100. Shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1003.

USER: Thank you.

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