You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: As its business trip, please book a ticket from Philadelphia, PA-PHL to Chicago, IL-ORD.

ASSISTANT: Sure, when are you planning to travel?

USER: Departure is on 08/29 and 08/31 is my return date.

ASSISTANT: Please provide your specifications.

USER: Price limit is 200.

ASSISTANT: May I know your name?

USER: Connections limit is 1. I am Karen Edwards.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.