Hello,. I am David Harris.
Hello, how can I aid you?
Please book me a flight ticket to Oakland as I have an emergency case to deal with. Can you help me with that?
 Sure, provide me your journey points?
 I need to leave from my nearest airport ATL to reach OAK.
Help me with your travel dates?
I want to travel on 07/10, and need to catch return flight on 07/12.
ok, please wait I will revert you.
Sure.
 Sorry, no flights are available on your travel dates.
Ok, no issues. Thanks for the information.
Thank you for availing us.