You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Gary Wright.

ASSISTANT: How can I assist you at this moment?

USER: I need direct flight for my journey from OAK to PHL, can you please help me to book my flight ticket?

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: I will depart on 06/16 and return on 06/18.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Gary Wright, there are no flight services available on your requested dates on this route.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for contacting us.