You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Janet King.

ASSISTANT: How may I help you?

USER: I want to celebrate my birthday at Boston, can you please help me to book a flight ticket from LAX to BOS?

ASSISTANT: Sure, I will help you. Please provide your trip dates.

USER: Sure, my travelling dates are Sept 27 and Sept 29.

ASSISTANT: Sorry Janet, there is no flights available on these dates.

USER: That's ok, thank you for your information.

ASSISTANT: Most welcome.