You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to attend a workshop at Boston, can you please help me in booking a flight ticket from LAS to BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travel dates are from July 31 to Aug 02.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: I prefer business class for my journey.

ASSISTANT: On which name should I reserve the flight ticket? Please wait a moment.

USER: Please book a flight with the name Samuel Collins. Sure, take your time.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

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

ASSISTANT: Thank you for reaching our service.