You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please help me to book a flight ticket from HOU to DFW.

ASSISTANT: Sure, let me know your travelling dates.

USER: My trip dates are from Jan, 21 to Jan, 23.

ASSISTANT: Is there any class preference?

USER: I prefer an economy class.

ASSISTANT: Do you have any other requirements?

USER: I need a single connecting flight and I need normal-cost airline to fly.

ASSISTANT: May I know your name please?

USER: I am Nancy Scott.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a Hawaiian airline, flight number: 1002, price: 100 with one connection.

USER: Please proceed.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.