You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donna Jackson, can you please help me in booking a flight ticket from PHL to OAK?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My departure is on 04/06 and my return will be on 04/08.

ASSISTANT: Sorry, no flight is found on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.