You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to search a flight from Chicago with the price of 500?

ASSISTANT: Sure, may I know your good name?

USER: Sure, my name is Frank Baker.

ASSISTANT: Please share me your travel dates.

USER: The travel dates are 10/23 to 10/25.

ASSISTANT: Where would your travel from?

USER: The airport codes are from IL-ORD to AZ-PHX.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: There is no flight on your route.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your information.