You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking the flight ticket from IAD to DFW?

ASSISTANT: May I know your trip dates?

USER: My travel dates are June 14 and June 16.

ASSISTANT: Is there any connection limit?

USER: I need a single connection flight.

ASSISTANT: Do you have any other requirements?

USER: My depart time should be in the afternoon.

ASSISTANT: May I know your name?

USER: Daniel Moore here, please check the flight with business class.

ASSISTANT: Sorry to inform that, there were no flights found with your required dates to travel.

USER: Oh! Not an issue, I will find an other way to reach my destination. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.