You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

USER: I want to attend my convocation ceremony, so please book my ticket from DTW to OAK.

ASSISTANT: Sure, I am mirthful to help you with that flight ticket booking. May I know your planned travel dates?

USER: My itinerary dates are Mar 17 and 19.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Edward Hernandez here.

ASSISTANT: Sorry to inform you that, there are no flights found on this route as per your travel dates.

USER: No problem, thank you.

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