You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you book a direct flight for me with my name Mary Campbell.

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Could you please help me with your travel dates for booking flight ticket?

USER: My planned dates are from 04/08 and 04/10.

ASSISTANT: May I know your preferable airport code names?

USER: My locations are from SFO to DTW.

ASSISTANT: Please give me a moment, I will check flight availability in this route.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: Based on your information, Southwest airline is ready to serve you with 1 connection with a minimum fare of 100 is available for you. Shall I proceed with this?

USER: I am looking for a direct flight as I said before.

ASSISTANT: Sorry for the inconvenience no direct flights available in this route.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for contacting us, have a nice day.