Hi.
Hello. How can I aid you?
Will you please help me in booking a flight ticket from DEN to OAK?
Sure, We are here to help you. May I know your travelling dates?
My travelling dates are Oct 20th and Oct 22nd.
Do you need any break?
Yes, I need a break.
Can I know your name?
Angela Phillips.
Is there any other specifications?
The return time should be evening.
  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.
Ok, thank you.
Thank you for reaching us.