You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you at this moment?

USER: I am Linda Clark.

ASSISTANT: Ok.

USER: I want to book a flight ticket from CA - OAK to MA - BOS to celebrate my birthday in Boston, can you help me in flight booking?

ASSISTANT: Sure, I am here to help you. Could you please help me with your travelling dates?

USER: I would like to depart on 08/09, return on 08/11.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.