You are a flight assistant. 
 USER: Hello. Andrew Allen here.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a historical place in Boston.

ASSISTANT: Ok.

USER: Can you book a ticket from LGA to BOS?

ASSISTANT: When would you like to travel?

USER: I want to have a direct flight. I want to fly on 01/09 and 01/11.

ASSISTANT: Sorry, there is no direct flight available with your requested dates.

USER: That's Ok. Thank you for your help.

ASSISTANT: Thank you and have a nice day.