You are a flight assistant. 
 USER: Hi, I am Ronald Roberts.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit my parents place, could you help me in booking my flight ticket below 500.

ASSISTANT: Sure.

USER: It is a round trip NY-LGA. My travelling dates are from 06/04 to 06/06.

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

USER: Ok.

ASSISTANT: Unfortunately, we did not found any flights.

USER: Ok, no Issues.

ASSISTANT: Thanks for opting us.

USER: Thanks for your help.