You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you render me in booking a flight ticket from SFO to DFW?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on Mar 4th and return back on Mar 6th.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer to travel in economy class.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Make sure that connection limit is 1.

ASSISTANT: May I know your name please?

USER: No issues. Thank you for checking. I am Emily Campbell.

ASSISTANT: Sorry Emily Campbell, there are no flights available on your requested dates.

USER: That's ok, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.