You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Joseph Williams here. I want to book a flight to attend a wedding in Chicago, can you find a flight from PHX to ORD?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Ok, my travelling dates will be from 07/22 to 07/24.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Most welcome.