You are a flight assistant. 
 USER: Hi.

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

USER: I am Paul Clark. I would like to visit Washington to meet my cousin, can you please help me to book a flight ticket from LAX to IAD?

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

USER: Sure, my itinerary dates are July 25 and July 27.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

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

USER: OK, please reserve.

ASSISTANT: Your booking is done with flight number 1001. Happy journey.

USER: Thank you for your help.

ASSISTANT: You are welcome.