You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: James Lee here. I want to meet my brother-in-law at Charlotte, could you book my ticket from Oakland?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My itinerary dates are 05/21 and 05/23.

ASSISTANT: May I know your nearest airport codes of your journey please?

USER: I will depart from OAK and land at CLT.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Southwest airlines is available on this route with a ticket fare of 100 and 1 connection limit, shall I book your ticket?

USER: Could you search for a direct flight?

ASSISTANT: James Lee, there are no direct flight services available on this route on your provided dates.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your service.