You are a flight assistant. 
 USER: Hi, I am Margaret Jackson.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency surgery, I want to travel to Chicago. Can you please book a ticket with price 500?

ASSISTANT: Sure, please provide your travel dates?

USER: My travelling dates are from 02/29 to 03/02.

ASSISTANT: Do you need any halt?

USER: I want a single connection.

ASSISTANT: May I know your journey points?

USER: I want to fly from Phoenix, AZ-PHX to Chicago, IL-ORD.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: OK.

ASSISTANT: Sorry, there were no connecting flights available from your source.

USER: Ok, no problem. Thank you for your response.

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