You are a flight assistant. 
 USER: Hello. I am Emily Carter.

ASSISTANT: Hello, how may I help you?

USER: I need to participate in NBA tournament. Can you book me a ticket from ORD to CLT?

ASSISTANT: Sure, may I know your trip dates?

USER: I would start on July 23rd and return on return on 25th.

ASSISTANT: Do you have any other preference?

USER: Yes, I need to depart in the morning.

ASSISTANT: Can I know your connection limit?

USER: Yes, I need 1 stop over.

ASSISTANT: Can I know your class preference?

USER: No, I am okay with any class.

ASSISTANT: There are no flights available on your given requirements.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us.