You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Anderson.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, I am here to help you out. Can you please share your travel dates to proceed for booking?

USER: I am departing on 12/01 and return on 12/03.

ASSISTANT: Sorry, there are no flights available for you in this route.

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

ASSISTANT: Thank you for reaching us.