You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am looking for a direct flight for my holiday trip to Oakland. So can you book a flight ticket for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: The travel dates are from 11 May to 13 May.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: The airport codes are from ATL to OAK.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any class preferences?

USER: That does not matter.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No, that is it.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Jessica Thomas.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Not a problem.

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

USER: Thank you.