You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Will you please help me to book a flight ticket from LAS to DCA?

ASSISTANT: Can I know your journey dates?

USER: My trip dates are Feb, 1 and Feb, 3.

ASSISTANT: Do you prefer connecting flight?

USER: No.

ASSISTANT: Is there any preference?

USER: No.

ASSISTANT: Please provide your name?

USER: Alexander  Johnson.

ASSISTANT: Found direct flight with Spirit airlines for price 100. Shall I book a ticket?

USER: Please proceed.

ASSISTANT: Ticket is booked having flight number 1008.

USER: Thank you.

ASSISTANT: Thank you.