You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Justin Williams is here. Can you please book a flight ticket from OAK to ATL?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: My travelling dates are Mar 15th and Mar 17th.

ASSISTANT: Do you have any other specifications?

USER: The depart time should be afternoon. I need a direct flight.

ASSISTANT: May I know your name?

USER: I already mentioned above.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for approaching us.