You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how can I render you today?

USER: Can you please book a flight ticket on dates Feb 21 and Feb 23?

ASSISTANT: Sure, I can help you with that. May I know your source and destination airport codes please?

USER:    My airport codes are DFW and ORD.

ASSISTANT: May I know your class and airline preference please?

USER: I want a ticket in business class.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Delta airlines is providing a flight on that route with ticket fare of 100 and 1 connection, it's departure time is 5 AM and arrival time is 8 AM. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Can I have your good name please?

USER: My name is Gregory Mitchell.

ASSISTANT: I have successfully booked you an economy class ticket in flight-1016, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.