You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to book a flight ticket from LAX to MSP?

ASSISTANT: Could you let me know your travelling dates?

USER: My travelling dates are 27 to 29 of  Mar.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: I am Richard Martinez.

ASSISTANT: Sorry currently there is no flight for your travelling dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you.