You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Can you please reserve me a flight ticket from LAS to BOS?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, my travel dates are from Aug 30 to Sept 01.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer to travel in a flight which has maximum one connection.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you have any other specifications for this trip?

USER: No, I don't have any other requirements.

ASSISTANT: May I know your good name please?

USER: Sarah Carter here.

ASSISTANT: Sarah Carter, we regret to inform you that there are no flight services are available on this route on your provided dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.