You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Please make a reservation with the name of Shirley Martinez to Washington on 08/19.

ASSISTANT: Sure, may I know your travel points?

USER: I am heading to Washington, DCA from New York, LGA.

ASSISTANT: Provide me your return date?

USER: I need to catch a return flight on 08/21.

ASSISTANT: Ok, please wait I will revert you in a moment.

USER: Sure.

ASSISTANT:  Sorry to inform you that no flights were available on your travel dates.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for availing us.