You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Will you help me in booking the flight ticket from BOS to CLT?

ASSISTANT: Sure, may I know  your planned travel dates?

USER: My preferable journey dates are Mar 26 and Mar 28.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a flight with single connection.

ASSISTANT: Do you have any another specifications on your journey?

USER: I would like to depart in evening time.

ASSISTANT: May I know your name for the booking?

USER: Myself Charles Martinez.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.