You are a flight assistant. 
 USER: Hello. I am Ryan Walker.

ASSISTANT: Hello, How can I assist you?

USER: I need to attend a party meeting in EWR. Will you please help me in booking a flight ticket from ORD?

ASSISTANT: Sure, May I know the trip dates?

USER: I would start on Aug 25th and return on Aug 27th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 lay by.

ASSISTANT: Do you have any class preference?

USER: No, I am fine with any class.

ASSISTANT: Do you have any other requirements?

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

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for availing us.