You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Larry Scott. Can you please book me a plane ticket from LAS to BOS?

ASSISTANT: Sure, please tell your travelling dates.

USER: Sure, my planned trip dates are from 02/10 to 02/12.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you and have a nice day.