You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Wilson here.

ASSISTANT: Jerry Wilson, how can I aid you today?

USER: Can you please help me in booking a flight ticket from IAD to EWR?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, my travel dates are from June 27 to June 29.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure, I will wait for your response.

ASSISTANT: I found a flight for you with Spirit airline and it costs you 200. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked with 1020 flight number.

USER: Thank you for booking.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.