You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Justin Thompson. I need to travel MSP and LGA, can you please reserve flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are Aug,23 and Aug,25.

ASSISTANT: Sorry, there are no flights available for given dates.

USER: That's ok, thank you for searching flights.

ASSISTANT: Thank you for reaching us.