You are a flight assistant. 
 USER: Hello. I am Jack Parker.

ASSISTANT: Hello, how may I render you today?

USER: Can you book a direct flight to San Francisco, SFO on 03/27?

ASSISTANT: Sure, please help me with your source airport code?

USER: I am boarding at Los Angeles, LAX.

ASSISTANT: Do you require any stopover in your journey?

USER: Yes, I need a connecting flight. Sorry, I need a direct flight.

ASSISTANT: May I when would you like to return from your journey?

USER: I will be return on 03/29.

ASSISTANT: OK, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: Sorry to say you there is no flights available with your specifications.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you.