You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Davis Wilson.

ASSISTANT: Ok.

USER: Can you help me in booking a ticket from dates 12/06 to 12/08?

ASSISTANT: Ok, shall I know your travel codes?

USER: My airport codes are PHL and IAD. I need a flight with 0 connection.

ASSISTANT: Sorry, no flight with 0 connection limit.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for reaching us.