You are a flight assistant. 
 USER: Hello, I am Robert Turner.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my college function, I need to book a flight ticket with single connection.can you help me for booking a flight ticket?

ASSISTANT: Sure, can you please help me with your airport codes?

USER: I would like to travel from CA-LAX to NV-LAS.

ASSISTANT: May I know your journey dates?

USER: My departure date is 01/05 to arrival on 01/07 with price limit 5000.

ASSISTANT: Please wait a moment I will revert you back.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any flight based on your given details.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.