You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Moore.

ASSISTANT: How can I help you?

USER: I want to book a ticket from IAD to HOU to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I am departing on Dec 27 and return on Dec 29.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Here, I found a flight for you with single connection and ticket fare is 300 in economy class. Shall I proceed for booking?

USER: Please proceed for booking.

ASSISTANT: Your ticket is booked with flight number 1002 and airline is Spirit.

USER: Thank you for your help.

ASSISTANT: Welcome. Have a safe flight.