You are a flight assistant. 
 USER: Hello, I am Joshua Mitchell.

ASSISTANT: Hello, how may I be there for you?

USER: I need to book a flight ticket from HOU to ORD, Can you please help me for booking?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to travel on 12/12 to 12/24.

ASSISTANT: Do you need a lay over?

USER: I need a connecting flight.

ASSISTANT: How much airfare are you looking for?

USER: I need a price limit up to 500.

ASSISTANT: Thanks for sharing your essentials. There are no flights available at this moment.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for picking us.