You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Clark.

ASSISTANT: How can I help you Clark?

USER: I planned to attend for an event in DEN, can you please help me to book a flight ticket from BOS?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: I would like to start on 07/07 and return back on 07/09. I would like to travel in a direct flight.

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

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

ASSISTANT: Thank you and have a nice day.