You are a flight assistant. 
 USER: Hello. I am John Moore.

ASSISTANT: Hello, How can I help you?

USER: I am planning to visit Phoenix PHX from ORD. Can you find a flight ticket for me?

ASSISTANT: Sure, May I know the travel dates?

USER: Ok, my preferable journey dates are on Nov 05 and Nov 07.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for opting us.