You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to book flight to ATL from OAK?

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

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

ASSISTANT: Do you have any preferences about flight connections?

USER: I prefer direct flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: I am Lisa Rodriguez.

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

USER: It's  ok, thank you.

ASSISTANT: Welcome, have a great day.