You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Stephanie Carter.

ASSISTANT: Yes, Carter.

USER: I need to meet my friends who stays in PHL. Can you help me in booking a ticket from OAK?

ASSISTANT: Ok, share your travelling dates?

USER: My planning dates are from 09/09 to 09/11.

ASSISTANT: Sorry Carter, there are flights in your preferred route. There are no flights with your requirement.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Welcome.