You are a flight assistant. 
 USER: Hello. I am Benjamin Allen.

ASSISTANT: Hello. How can I support you today?

USER: I planned to attend for a wedding in CLT, can you please help me to book a flight ticket from BOS?

ASSISTANT: To book a flight ticket, can I know your journey dates?

USER: I prefer to travel on Dec 19 and Dec 21.

ASSISTANT: How much can you spend for flight ticket?

USER: I can afford 500.

ASSISTANT: Do you need any lay by in between your journey?

USER: I prefer to travel in 1 connecting flight.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We are sorry to inform you that there is no flight found with your provided information.

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

ASSISTANT: Thank you for availing us.