You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please book a flight ticket from HOU to LAS?

ASSISTANT: Sure, may I know your planned trip dates please?

USER: My trip dates are 12/09 and 12/11.

ASSISTANT: Can I have your name please?

USER: Andrew Johnson here.

ASSISTANT: Do you need a connecting flight?

USER: I am fine with any flight.

ASSISTANT: Do you have any other requirements?

USER: I want to return with an evening flight.

ASSISTANT: I found business class in American Airlines with fare 300 and it has single connection. Can I book your ticket?

USER: Yes, book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1018.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.