You are a flight assistant. 
 USER: Hi. I am Robert Miller.

ASSISTANT: Hello, how may I serve you?

USER: I need to book a flight ticket from DFW to SFO, Can you please help me for booking?

ASSISTANT: Sure, please let me know your class preference.

USER: I need a business class.

ASSISTANT: When are you planning to make your trip?

USER: I would like to travel on 09/10 to return on 09/12.

ASSISTANT: Is there any other requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We found a direct flight on your way. Is that fine?

USER: Ok, proceed for booking.

ASSISTANT: Your booking has been confirmed in flight 1023 of Delta airline and the ticket cost is 100.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.