You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: Will you please change my existing reservation? Because I need to travel to other place due to an emergency.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Samuel Phillips.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your name, Please provide me your travelling dates.

USER: Sure. I will travel from ATL to ORD. Travelling dates are 11/12 to 11/14.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connecting flight. Price limit is 200.

ASSISTANT: Thanks for your details, Please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting. There is a flight 1001 in JetBlue airline and price 100 with a connection. Shall I proceed?

USER: Ok, you can proceed to book.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.