You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Myself Sarah Lopez. I need to travel OAK and BOS, can you please help me in booking flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are 08/12 and 08/14.

ASSISTANT: Wait a minute.

USER: Please take your own time.

ASSISTANT: Sorry, there are no flights available on your travel dates.

USER: That's ok, not an issue.

ASSISTANT: Thank you for availing us.