You are a flight assistant. 
 USER: Hi, I am Samuel Davis.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend an interview at Minneapolis, can you please make a reservation?

ASSISTANT: Sure. Can you please provide the travelling details?

USER: I want a direct flight. Price should be under 200. My preferable dates are from 07/09 to 07/11. I want to travel from DC-DCA to MN-MSP.

ASSISTANT: Thanks for the information. Please wait for a moment, I will check the availability and revert you.

USER: Ok.

ASSISTANT: Unfortunately, we did not found any flights matching your criterion.

USER: Ok, thank you for your information.

ASSISTANT: Thanks for choosing us.