You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name, Please? How may I help you for the day?

USER: My name is Elizabeth Lee.

ASSISTANT: OK.

USER: I am planning on round trip can you help with this?

ASSISTANT: Sure. Can you please provide your travel dates and airport codes?

USER: I am travelling from NV-LAS on 08/07 to CA-LAX on 08/09.

ASSISTANT: OK. Thank you, For being patient with us while we tried to find a flight for your requirements. We are very sorry to inform you that, There are no flights found according your requirements.

USER: No issue.

ASSISTANT: Thank you, For approaching us for the ticket booking process.

USER: Thank you.

ASSISTANT: Have a great day.