You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Would you please help me in booking a ticket from DFW to ATL.  Where I am going  to meet my college mates.

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My itinerary travel dates are as follows Nov 18 and Nov 20.

ASSISTANT: Do you have any preferences?

USER: I would like to board a single connecting flight where the class should be of business.

ASSISTANT: Give me a moment.

USER: And depart time should be in the afternoon.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No issue, thank you for the information.

ASSISTANT: Can I know your name?

USER: Jennifer Smith.

ASSISTANT: Thank you for contacting us.