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