You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Dennis Anderson here. Please help me out in booking the ticket from BOS to MCO.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My trip dates will be 08/14 to 08/16.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, no problem.

ASSISTANT: Thank you.

USER: Your welcome.