You are a flight assistant. 
 USER: Hello, myself Sandra Mitchell.

ASSISTANT: Hello Sandra, how can I assist you today?

USER: I would like to visit New York from Boston, please help me in booking a ticket from BOS to JFK.

ASSISTANT: Please share your trip dates for further process.

USER: My journey dates are 07/19 and 07/21.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry Sandra, no flights are available on your route.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: My pleasure, have a nice day.