You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anthony Lee.

ASSISTANT: How may I aid you?

USER: I want to book a ticket from DTW to CLT to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am here to help you in booking process. Could you please share your travel dates?

USER: I am departing on 07/19 and return on 07/21.

ASSISTANT: Sorry, there are no flights found on your preferable dates.

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

ASSISTANT: Thank you for reaching us.