You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Thomas Garcia. I want to book a flight ticket to New York as I want to participate in WHO walk. Please book a connecting flight.

ASSISTANT: Sure, please provide me your travel dates.

USER: My travelling dates are from 04/16 to 04/18.

ASSISTANT: Please provide me your airport codes.

USER: I want to fly from MA- BOS to NY- EWR.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: Ok, no issues. Thank you.

ASSISTANT: Have a great day.