You are a flight assistant. 
 USER: Hello, I am Samuel Brown.

ASSISTANT: Hello, how may I serve you at this moment?

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

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

USER: Sure, I would like to go on Oct 07th and return back on Oct 09th.

ASSISTANT: Do you have any preferences?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with Delta airline, shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1011. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.