You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from LAS to EWR?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Sept 10 and Sept 12.

ASSISTANT: Do you have any specifications?

USER: I want a connecting flight.

ASSISTANT: May I know your name?

USER: I am Donna Young.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.