You are a flight assistant. 
 USER: Hello, I am Cynthia Campbell.

ASSISTANT: Hello, Cynthia Campbell, Which kind of help you need from us?

USER: I want to meet my old friend at Chicago, IL - ORD. Can you please help me to book a single connection of flight?

ASSISTANT: Sure, we need your boarding point?

USER: My boarding point is from Las Vegas, NV - LAS.

ASSISTANT: What are your chosen travel dates?

USER: My travel dates are 05/17 to 05/19.

ASSISTANT: Thanks for your time. Sorry, there are no flights found on your travelling dates.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for approaching us.