You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Allen.

ASSISTANT: What can I do for you?

USER: I want to watch a sunrise at LAS, could you please help me in booking a ticket from JFK?

ASSISTANT: Ok, can you please share your travel dates?

USER: My travelling dates are from 07/27 to 07/29. I need a direct flight.

ASSISTANT: Sorry Allen, there is no direct flight as per your request.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for choosing our service.