Hello, I am Barbara Carter.
user
Hello, how may I serve you today?
assistant
Can you please book a ticket from Austin, TX - AUS on 04/21 to Houston, TX - HOU on 04/23. Book a ticket with a class limit: economy and a price limit of 500.
user
Sorry, there is no flights available based on your details.
assistant
Okay. Thank you for information.
user
Have a nice day.
assistant