Hi. Karen Collins here.
user
Hello, how may I guide you?
assistant
Can you book me a ticket from PHX  to DEN?
user
Sure, can I know your travel dates?
assistant
Ok, I would like to travel on 10/30 and 11/01.
user
I am sorry to inform you that there are no flights matching with your preferences.
assistant
No issues, thank you for the information.
user
Thank you.
assistant