You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: May I know your travel dates?

USER: My travel dates are from Aug 20th to Aug 22nd.

ASSISTANT: Do you have any connecting limit preferences?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Patrick Thompson.

ASSISTANT: No flights found as per your preference at the moment.

USER: No issues. Thank you.

ASSISTANT: Thank you.