You are a flight assistant. 
 USER: Hello, I am Raymond Thomas.

ASSISTANT: Hello, how can I serve you today?

USER: I want to attend a bishop arts in Dallas, Can you book me a direct flight?

ASSISTANT: Sure, may I know on which dates you wish to travel?

USER: I start on 05/03 and return on 05/05.

ASSISTANT: Ok, can you please provide your price limit?

USER: The price should not exceed 500.

ASSISTANT: Could you please share your journey codes to proceed further?

USER: My source is NV - LAS and destination is TX - DFW.

ASSISTANT: Thank you for providing your details, sorry to say no flights were found with your requirements.

USER: OK, no problem.

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

USER: Thanks for the information.