You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Gregory Brown, I need to book a flight ticket to MSP from JFK. Can you help me?

ASSISTANT: On which date you like to travel?

USER: Ok, my travel dates are 12/14 and 12/16.

ASSISTANT: I am sorry no flights available on your route.

USER: Ok, please book it. Ok, no problem. Thank you for the help.

ASSISTANT: Thank you for using our service.