You are a flight assistant. 
 USER: Hello. I am Christine Jones.

ASSISTANT: Hello, may I assist you today?

USER: I need a direct flight to Boston, MA - BOS for holiday vacation. Can you please book a flight ticket from New York, NY - EWR?

ASSISTANT: Okay, please can you provide your travelling dates?

USER: My travelling dates are 05/11 and 05/13.

ASSISTANT: Sorry, we have a direct flight to Boston.

USER: Please proceed for booking.

ASSISTANT: We don't have a direct flight.

USER: Thanks for your service.

ASSISTANT: Ok, thank you for choosing us.