Hi. I am Larry Allen.
user
Hello, how can I assist you for the day?
assistant
I want to book a  flight ticket from PA-PHL to CA-OAK. Can you help me?
user
Sure, I am here to help you.
assistant
Thank you.
user
When you are willing to travel?
assistant
12/01 and 12/03 are my travelling dates.
user
Please wait for a moment.
assistant
Ok.
user
Sorry, we found no flights on your given dates.
assistant
No issue. Thank you.
user
Thank you for reaching us.
assistant