You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Benjamin Nelson here. Reserve a flight ticket for me that is for my airport codes PHX to ORD. For my business trip.

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

USER: My travel dates are 05/27 to 05/29. I need a connecting flight.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: You are most welcome.