You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel from PHL to ORD as a business trip, can you do the reservation?

ASSISTANT: Sure, we are happy to help you. Can I have your travelling dates?

USER: My trip dates are 08/01 and 08/03.

ASSISTANT: Do you have any other specifications?

USER: I am comfortable with normal cost airline.

ASSISTANT: May I know your good name?

USER: Stephen Parker here.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.