You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to submit my project work at New York university, can you please book the ticket from LAS to EWR?

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

USER: Sure, my planned departure and return travel dates are 13th and 15th of Feb.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer single connected flight to travel.

ASSISTANT: May I know your good name please?

USER: My name is Mary Martin.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for your information.