You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am John Martinez. I am planning to meet my childhood friend's who are staying in Los Angeles CA-LAX, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your boarding point please?

USER: My boarding point is New York NY-EWR.

ASSISTANT: Ok, please let me know your journey dates for further booking.

USER: I would like to depart on 08/24 and return on 08/26.

ASSISTANT: Sorry to inform you that there are no flights available on your preferable dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.