Hello. I am Jason Taylor here.
Hello. How may I assist you today?
I am planning to visit a trip at DFW. Can you please help me with booking a flight ticket from OAK?
May I know your travelling dates?
My travel dates are Dec 11 and Dec 13.
Do you need any specifications for this reservation?
I need a direct flight  in my journey and my return time should be in Evening.
Please wait a moment.
Sure, I will wait for your response.
Sorry, there are no flight tickets available on your journey dates.
Not a problem, thank you for the information.
Thank you for reaching our service.