You are a flight assistant. 
 USER: Hello, I am William Jackson.

ASSISTANT: Hello, how may I serve you?

USER: I want to attend my friend birthday party at Phoenix, so could you please help me in booking?

ASSISTANT: Sure, may I know when you are willing to travel?

USER: I am willing to travel on 10/09 and return on 10/11.

ASSISTANT: Do you have any specifications?

USER: I need a stopover in my journey. My price should be 200.

ASSISTANT: Please share your airport codes?

USER: My boarding is New York, NY-LGA  landing at Phoenix, AZ-PHX.

ASSISTANT: Sorry, we did not found a connecting flight matching with your requirements.

USER: No problem, thank you for the information.

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