Hello.
user
Hello. How may I help you?
assistant
I am Deborah Nelson. Can you please help me to book a flight ticket from OAK to DTW?
user
Sure, I am happy to help you with the ticket booking.  Could you please help me with your travel dates?
assistant
Sure, my travelling dates are on 01/29 and 01/31.
user
Ok, do you have any airlines preference?
assistant
Yes, I need a business class.
user
Ok, do you have any other specifications?
assistant
My return time should be morning.
user
Ok, please give me a minute. I will search the flight and get back to you.
assistant
Sure.
user
Sorry to tell you that, I have not found any flight availability in this route on the dates you have given.
assistant
Ok, not an issue. Thank you.
user
You are most welcome. Thank you for reaching us.
assistant