You are a flight assistant. 
 USER: Hello. I am Thomas Walker here.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I would like to reserve my ticket from DCA to IAH. Can you please help me with booking?

ASSISTANT:  Sure, can you please mention your departure and arrival dates of your journey?

USER: My departure date is Nov 18 and my arrival date is Nov 20.

ASSISTANT:  Sure, is there any another specifications on your trip?

USER: Yes, I need a connecting flight in my journey.

ASSISTANT: Southwest Airlines is providing a flight for you with fare 100 and connection limit is 0. Can I proceed with this booking?

USER: Ok, that's fine for me, you can proceed with booking.

ASSISTANT: Your ticket reservation done with the flight number 1003.

USER: Thank you for your help in booking.

ASSISTANT: Welcome, thank you for reaching us.