You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Michelle Harris. I am looking for a flight from PHX to DFW, can you help me out?

ASSISTANT: May I know your desired travel date please?

USER: My trip dates are from 02/20 till 02/22.

ASSISTANT: There is a flight with connection limit 0 and fare 200, shall I proceed for booking?

USER: I need a connecting flight.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for opting us.