You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Catherine Hernandez. I planned to meet my cousin in LAX, can you please help me to book a flight ticket from BOS?

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

USER: I planned to travel on 09/21 and 09/23.

ASSISTANT: Sorry, there is no plane as per your requested travelling dates.

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

ASSISTANT: My pleasure, have a great day.