You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Green. I want to schedule my trip to Philadelphia, PA-PHL from Chicago, IL-ORD, can you please book me a ticket?

ASSISTANT: Sure, I can book a ticket for you.

USER: Thank you.

ASSISTANT: May I know your planned travel dates?

USER: My planned travel dates are from 03/21 to 03/23.

ASSISTANT: An UA airline plane is available for you with an airfare of 100 and with one connection. Shall I proceed to book this flight?

USER: Please book my ticket.

ASSISTANT: Ok, your booking has been confirmed with 1003 flight.

USER: Thank you.

ASSISTANT: Thank you for reaching us to serve you, have a nice day.