You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you aid me to book a ticket from ORD to SEA?

ASSISTANT: Sure, I am mirthful to help you with that. Can you please share your preferable travel dates?

USER: My travel dates are Jun 4 and Jun 6 respectively.

ASSISTANT: May I know your name please?

USER: Donna Nelson here.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Would you like to board a direct or connecting flight?

USER: I prefer for a lay by.

ASSISTANT: Do you have any other specifications?

USER: No other specifications for me.

ASSISTANT: There is a connecting flight-1020 available in Frontier Airlines with a fare of 200. Shall I book it?

USER: Please proceed.

ASSISTANT: Donna Nelson, your booking is confirmed successfully in economy class.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us, have a safe journey.