You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a light ticket from IAD to PHL?

ASSISTANT: Thank you. Please let me know your travel dates.

USER: My travel dates are Mar 21 and Mar 23.

ASSISTANT: Thank you. May I know your name?

USER: I am Kenneth Green.

ASSISTANT: Thank you. Please let me know your class preference.

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Flight-1007 with single connection is available in UA Airlines and the ticket fare is 100 only in business class. Flight departs at 7:00 hours and arrives at 19:00 hours. Can I book the ticket for you?

USER: Please confirm it.

ASSISTANT: Your ticket is confirmed successfully. Have a great flight.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.