You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Brenda King.

ASSISTANT: Ok.

USER: Can you help me booking a flight ticket from IAD to DFW?

ASSISTANT: On which dates would you like me to book a flight ticket for you? Sure, we are perky to help you.

USER: I will start on 10/22 and return on 10/24.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: I need to start in the evening time.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: We found 1028 Spirit airlines with single connection with economy class and depart time is 2:00 AM.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been reserved with price 200.

USER: Thank you.

ASSISTANT: Thank you for choosing us.