You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Jonathan Perez want to visit OAK, can you book a ticket from BOS?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, my travelling dates will be 08/24 and 08/26.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: That's ok, thank you.

ASSISTANT: Your welcome.