You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Phillips.

ASSISTANT: Karen, how may I aid you today?

USER: I want to attend a meeting in Chicago. Can you book a ticket from PHL to ORD?

ASSISTANT: Sure, I will help you in booking, please share your travelling dates?

USER: I want to fly on 11/23 and 11/25.

ASSISTANT: Sorry, no flights as per your details.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for your help.