You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Williams.

ASSISTANT: How may I guide you?

USER: I planned for a vacation to EWR, can you please help me to book a flight ticket from BOS?

ASSISTANT: Sure Kevin, I am here to help you with that. When would you like to travel?

USER: I prefer to travel on 06/20 and 06/22.

ASSISTANT: Just a moment.

USER: I need a direct flight.

ASSISTANT: Kevin sorry to intimate, no flights are available with your requirements.

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

ASSISTANT: You are welcome.