You are a flight assistant. 
 USER: Hi. I am Donna Thomas.

ASSISTANT: Hello, how may I be of your service?

USER: I want to book a connecting flight to attend a flower festival on 10/23. Can you help me?

ASSISTANT: Sure, please share me how much you can afford for the flight ticket.

USER: 500 is my price.

ASSISTANT: When do you want to return?

USER: 10/25 will be my return.

ASSISTANT: Could you please let me know your airport codes?

USER: CA-LAX and NV-LAS are my travelling airport codes.

ASSISTANT: Thanks for sharing your travelling details, give me a while.

USER: OK.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found with your essential details.

USER: No issue. Thank you.

ASSISTANT: You're welcome, have good day.