You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking to book a flight ticket from IAH to LAS. Can you help me for that?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are Apr 17 and Apr 19.

ASSISTANT: Do you want connecting flight?

USER: I prefer to book a single connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Donald Baker.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: We found a Hawaiian airline, flight number: 1004, price: 200 with one connection.

USER: Ok, proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.