You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to fly from PHX to DFW. Can you check the flight availability on that route?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My planned travel dates are 02/19 and 02/21.

ASSISTANT: May I know your name for further process?

USER: Scott Walker here.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: Make sure that, my depart time in evening and return time in afternoon only.

ASSISTANT: Do you have any another specifications?

USER: I want a flight with single connection.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.