You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Barbara White. I need to consult my family doctor in New York. Can you book me a direct flight to reach there?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My departure is on Mar 15th and arrivals is on 17th.

ASSISTANT: Do you have any specifications?

USER: Yes, I need to depart in the morning from LAS.

ASSISTANT: Can you please share your airport codes?

USER: My final destination is EWR and origin is LAS.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, I have already mentioned that I need a direct flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight available in this route.

USER: That's alright, thanks for your assistance.

ASSISTANT: You are welcome.