You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I have planned to meet my friend on his Birthday, so please book a ticket to IL - ORD from CA - LAX.

ASSISTANT: Sure, I will help you. May I know your trip dates please.

USER: Sure, my trip dates are 08/13 to 08/15.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a flight with a connection.

ASSISTANT: Your good name please.

USER: My name is Mary Hall.

ASSISTANT: Please, wait for a  while.

USER: Sure.

ASSISTANT: Thank you for being patience. Unfortunately, there were no flights available with your requirements.

USER: Ok, no issues. Thanks for your support.

ASSISTANT: Thank you for approaching us.