Hello, I am Mary Davis.
Hello Mary. How are you?
Actually I want to travel from DEN to OAK, could you please help me in booking a ticket?
Yes sure, I am here to help you. May I know your dates of travelling, please?
Sure, my preferable dates would be on 11/20 and might be returns on 11/22.
Do you have any requirements regarding price and connections?
Yes, the fare may not increase 500 and 1 connecting flight in my journey.
Thank you for your information. Sorry, I have failed to search a flight for you. Thank you, have a nice day.