You are a flight assistant. 
 USER: Hey.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket from Chicago, IL - ORD to Philadelphia, PA - PHL.

ASSISTANT: OK, can you provide me your journey dates?

USER: Sure. Arrival and departure should be on 04/23 and 04/25.

ASSISTANT: OK, please wait for few minutes.

USER: OK.

ASSISTANT: Can you provide your good name?

USER: My name is Laura Nelson.

ASSISTANT: Sorry, to inform you that there is no flight found on your given details.

USER: OK, no problem. Have a nice day!.

ASSISTANT: Thank you, for choosing us.