You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Can you please help me in booking a flight ticket to DFW from SEA?

ASSISTANT: Sure, please share me your planned journey dates?

USER: My planned dates are from Sept 15 to Sept 17.

ASSISTANT: Please mention your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other requirement?

USER: I would like to depart and return in the afternoon.

ASSISTANT: May I know your name please?

USER: I am Frank Evans.

ASSISTANT: Thank you for the details, sorry there is no flight available in afternoon in your journey route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.