You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I help you?

USER: I need to travel from Philadelphia to Chicago. PA-PHL to IL-ORD.

ASSISTANT: Can you please provide your travelling dates?

USER: From 04/02 to 04/04.

ASSISTANT: May I know your name?

USER: Price limit 1000. My name is Robert Martin.

ASSISTANT: There is flight which matches your requirements the flight details are flight number : 1029, flight name :  Southwest with 1 connection.

USER: Can you let me know price ?

ASSISTANT: Price limit is 100.

USER: Book a ticket.

ASSISTANT: Your booking is done.

USER: Thanks for the assistance.

ASSISTANT: Thank you.