You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Could you book my ticket from ATL to OAK?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My itinerary dates are July 12 and July 14.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a connecting flight.

ASSISTANT: Please mention your name.

USER: Robert Parker here.

ASSISTANT: There are no flights found under your preferable details.

USER: I want to depart in the morning from Atlanta. Could you check?

ASSISTANT: There are no flights found under your preferable details.

USER: No problem, thank you.

ASSISTANT: Welcome, have a great day.