You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be there for you?

USER: Can you please help me in booking a flight ticket to OAK from DTW?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: My travel dates are from Oct 23 to Oct 25.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any specifications?

USER: No, thanks for asking.

ASSISTANT: May I know your name?

USER: I am Melissa Jones.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Ok.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for opting us.