You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: David Lopez here. I want to fly from LAS to PHX. Can you check the flight availability on this root/.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My planned travel dates are 03/04 and 03/06.

ASSISTANT: Note. Do you have any class or time preferences?

USER: Make sure that, my return time should be in afternoon only.

ASSISTANT: Do you have any connection or airline preferences?

USER: I want a flight with maximum connection of 1.

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

USER: No issues, thank you for the information.

ASSISTANT: You are welcome, have a nice day.