You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dennis Martin. I want to book a flight ticket from TX-HOU to DC-IAD. Can you help me?

ASSISTANT: Sure, on what dates will you be travelling?

USER: 09/14 and 09/16 are my travelling dates.

ASSISTANT: Do you need a stop over within your route to IAD?

USER: I need a connecting flight.

ASSISTANT: Is there any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: Ok, there is an Delta airline with flight number 1008 is going on your way and the fare is 100. Is that fine?

USER: You can reserve it.

ASSISTANT: Your booking has been confirmed successfully.

USER: Thank you for your help.