You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency. How can I assist you today?

USER: I'm Cynthia Allen. I have planned to visit New England Aquarium at Boston, can you help me with booking a flight ticket from LAS to BOS?

ASSISTANT: Sure, can you please share your preferable travel dates.

USER: I would like to take off on 07/07 and return on 07/09.

ASSISTANT: Ok, let me check for the availability of flight on this route.

USER: Sure.

ASSISTANT: Cynthia, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us.