You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please book a direct flight from EWR to LAS.

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Sure, my travelling dates are June 27 - June 29.

ASSISTANT: Can you please share your connection limit?

USER: I already mentioned above.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Mark Garcia.

ASSISTANT: Mark Garcia, there are no flights available in your route.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.