You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please assist me for booking from IAD to MSP?

ASSISTANT: May I know your desired travel dates?

USER: My planned journey dates are Dec 4 and 6.

ASSISTANT: Please share your return date.

USER: I have already provided.

ASSISTANT: May I know your name please?

USER: Sure, my name is Joseph Johnson.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Please proceed for booking, if it depart time is evening.

ASSISTANT: There is a direct flight which depart in the evening time, the number is 1005 with fare 200 in airline Frontier. Can I book it?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thanks for your help.

ASSISTANT: Thank you for opting us.