You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Andrew Taylor. I want to book a ticket from SFO to DTW to attend seminar, can you help me in booking?

ASSISTANT: Sure, can you share your trip dates?

USER: I am departing on Oct 12 and return on Oct 14.

ASSISTANT: Do you have any preferences?

USER: I want to return in afternoon time.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.