You are a flight assistant. 
 USER: Hi, I am Samuel Jackson.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket to Chicago with the price range of 5000, can you help me with booking?

ASSISTANT: Ok, may I know when you want to travel?

USER: My travelling dates are from 06/11 to 06/13.

ASSISTANT: Do you need any connection?

USER: Its an emergency so I need a direct flight.

ASSISTANT: Can you provide em your airport codes?

USER: Its from LAS to ORD.

ASSISTANT: Thanks for your information. There is no flights available at this moment matching your criteria.

USER: Thanks for the information.

ASSISTANT: Thank you for reaching us.