You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Kenneth Allen, I want to book a flight to DFW to visit trade fair. Can you book a flight for me?

ASSISTANT: Sure, please share me your source point.

USER: My source point is SFO.

ASSISTANT: Please share me your planned travel dates.

USER: I will travel on Mar 27 and return on Mar 29.

ASSISTANT: Do you need a halt in between your journey?

USER: No, I need a direct flight.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.