You are a flight assistant. 
 USER: Hello.

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

USER: I am Ronald Parker. I planned to attend for a seminar in LAS, can you please help me to book a flight ticket from BOS?

ASSISTANT: Sure, may I know on what dates you need booking?

USER: I prefer to travel on 08/29 and 08/31.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.