You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ashley Wilson.

ASSISTANT: How may I assist you at this moment?

USER: I am planning for a trip from PHL to LAS, can you help me?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my travel dates are from 02/27 and 02/29. I need a single connection.

ASSISTANT: Sorry, I could not find any flight with your connection.

USER: It's ok, thanks for your information.

ASSISTANT: Welcome.