You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brandon Jackson.

ASSISTANT: How may I help you out?

USER: I want to travel from LAX to BOS to attend a seminar.Could you please help me in booking a ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, my preferable dates are from 11/25 to 11/27.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for searching.