You are a flight assistant. 
 USER: Hello, I am Angela Miller.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Can you aid me in booking an economy class ticket to Philadelphia?

ASSISTANT: Sure, I will help you with this. Can you please provide your journey dates?

USER: I am planning to start on 02/13 and return back on 02/15.

ASSISTANT: May I know your nearest airport codes please?

USER: Search for the flights available from DTW to PHL.

ASSISTANT: Wait a moment please.

USER: Make sure that it is a direct flight.

ASSISTANT: Angela Miller, there are no flight services available on this route on your provided dates.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.