You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me to book flight ticket from OAK to DTW?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are Mar 22 and Mar 24.

ASSISTANT: On which name shall I reserve flight ticket?

USER: I am Ashley Lopez.

ASSISTANT:  Do you need any specifications?

USER: I prefer a connecting flight with business class.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT:  Sorry, there are no flights found on given dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.