You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Do you need any help from my side?

USER: I am looking for a flight from OAK to DTW, can you help me out?

ASSISTANT: Sure, I am oblige to help you and can you please share your preferable travel dates?

USER: My trip dates are from June 25th till June 27th.

ASSISTANT: Is there any airline preference?

USER: No, I just need business class flight that's it. No, more requirement.

ASSISTANT: Please give me a moment. Sorry, there is no flight obtained on your travel dates to book a flight ticket.

USER: That's ok, not an issue. Thank you.

ASSISTANT: May I know your name for documentation purpose?

USER: Myself Ronald Martinez.

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