Hello.
user
Hello, do you need any help from us?
assistant
I am Debra Turner. Can you please book a business class ticket from OAK to AUS?
user
Sure, could you please share your departure and arrival day?
assistant
My travelling dates are 10/21 and 10/23.
user
Ok, do you have any other specifications?
assistant
      I want to depart in the evening and return at evening.
user
Sorry, there is no flight on your requested travelling dates.
assistant
That's ok, thank you for the response.
user
You are welcome, have a great day.
assistant