You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: My name is Karen Hill and I want to book the flight ticket from LAS to EWR. Can you please help me?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are May 17 and May 19.

ASSISTANT: Let me know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements to be met?

USER: I need a single connection flight.

ASSISTANT: Sorry, no flights found on your travel dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.