You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please search a direct flight from SFO?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Aug 02 and Aug 04.

ASSISTANT: Please share me your destination point.

USER: My destination airport is DFW.

ASSISTANT: May I know your connection limit?

USER: I have already mentioned you.

ASSISTANT: Do you have any other specifications?

USER: I need my return ticket at evening time.

ASSISTANT: Your good name please.

USER: Myself Sarah Phillips.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.