You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kimberly Thomas.

ASSISTANT: How can I help you at this moment?

USER: I need to attend a music concert in Los Angeles so please help me with flight ticket booking from Boston.

ASSISTANT: Sure, I am happy to help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please let me know your preferable travel dates for booking flight ticket?

USER: Sure, I need to travel on dates of 02/25 and 02/27.

ASSISTANT: May I know your airport code names?

USER: Sure, I would like to travel from BOS to LAX.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure, take your time to check.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Oh! It is sad to hear. Anyway, I will choose another agency this time. Thank you for your time.

ASSISTANT: You are welcome.