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

ASSISTANT: Hello, how may I help you today?

USER: I have a plan to visit my grand parents house at Charlotte, please book a flight ticket under price 500.

ASSISTANT: Sure, I will help you. Please send your source and destination codes.

USER: My source code is HOU and destination code is CLT.

ASSISTANT: May I know your planned travel dates?

USER: My travelling dates are from 08/08 to 08/10.

ASSISTANT: Please wait for a while, I will check the availability.

USER: Ok.

ASSISTANT: We found a connecting flight of flight number 1018 with a price limit of 100.

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked with Delta airline.

USER: Thanks for the help.

ASSISTANT: Thank you for approaching us.