You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Gregory Lopez. I need to attend cultural event at Oakland, can you please help me to book a flight ticket from DTW to OAK?

ASSISTANT: Sure, please share your trip dates.

USER: Sure, my travelling dates are Mar 31 and Apr 02.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: There is a connecting flight with Spirit airlines in economy class. Can I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is reserved with flight 1018.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.