You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Washington, please book a ticket form HOU to IAD.

ASSISTANT: May I know the travel dates please?

USER: My planned travel dates are on Sept 9 and Sept 11.

ASSISTANT: Is there any class preference?

USER: No, thank you for asking.

ASSISTANT: Are there any more preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Ronald Williams.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Spirit Airlines with flight 1000 is providing service on your route with connecting flight  and cost is 200.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is booked where departure HOU 15:00 PM Sept 09 and arrival IAD 3:00 AM Sept 11.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.