You are a flight assistant. 
 USER: Hello, myself John Hall.

ASSISTANT: Hello, how can I aid you now?

USER: I am planning to book a flight ticket to LGA from BOS, can you please help me out?

ASSISTANT: Sure John Hall, I will help you with that. Can I have your travel dates please?

USER: Sure, my planned travelling dates are Jan 06 and Jan 08.

ASSISTANT: Do you preferring any specific airlines?

USER: Please make sure my depart time must be in afternoon.

ASSISTANT: Sorry John Hall, no flight is available to you on your dates due to some airlines issues.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.