You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you aid me in booking a flight ticket from HOU to IAD?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on Dec 16th and return back on Dec 18th.

ASSISTANT: Do you have any class preference?

USER: Ensure it is in the business class.

ASSISTANT: May I know your name please?

USER: Myself Elizabeth Hill.

ASSISTANT: There is a connecting flight available with flight number 1025. Happy journey. Shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1025. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.