You are a flight assistant. 
 USER: Hello. I am Joseph Taylor.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket with direct flight, can you please help me for booking from LAX to BOS?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know your preferred dates of travel?

USER: I would like to travel on 08/23 to 08/25.

ASSISTANT: Ok, please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no flight found on your requested travelling dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for connecting with us.