You are a flight assistant. 
 USER: Hello. I am Betty Lee.

ASSISTANT: Hello, how may I serve you now?

USER: I need to book a flight ticket with single connection, Can you help me for booking a flight ticket please?

ASSISTANT: Sure, I will help you with booking. Please share me on what dates would you like to travel?

USER: I would like to travel on 04/19 to arrival on 04/21.

ASSISTANT: Please mention your price limit for flight ticket?

USER: I need price limit should not exceed 500.

ASSISTANT: Please provide me the source and destination airport codes?

USER: Source point is CO-DEN and destination point is DC-IAD.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, I found a flight of Spirit, flight number is 1002 and price of flight ticket is 100. Shall I book the flight ticket?

USER: Yes, proceed please.

ASSISTANT: Your flight ticket has been booked on flight 1002.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.