You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do for you at this moment?

USER: Can you please help me to book flight ticket from JFK to LAX?

ASSISTANT: Sure, we are glad to assist you in booking. May I know your name please?

USER: I am Robert Davis.

ASSISTANT: Do you need a break in the middle of your way?

USER: Yes, I need a break in between the journey.

ASSISTANT: Help me with your journey dates, so that it will be easier to move further in booking.

USER: My trip dates are Sept 4 and Sept 6.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I prefer an economy class to travel.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: It's ok, thank you.

ASSISTANT: Thank you for approaching us.