You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket from IAD to CLT to meet my friends and conduct an event in my college. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you with the booking.

USER: Thank you for accepting my request.

ASSISTANT: May I know when are you willing to travel?

USER: Sure, my travelling dates are Mar 27 and Mar 29.

ASSISTANT: I have a direct flight for you to travel, is it ok?

USER: Yes, I am fine with it.

ASSISTANT: May I know your class preference for this trip?

USER: No, I am comfortable with any class.

ASSISTANT: Is there any specific times are you looking to board and return?

USER: No, I am comfortable with any timings.

ASSISTANT: Thank you for providing all the required details, we have a flight from Spirit airlines, number 1000 and it is costing 100 to you. Please let me know if you want to proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: May I know your name to proceed, please?

USER: I am David Hall.

ASSISTANT: Your ticket has been reserved in economy class. It is a direct flight.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.