You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Andrew Lewis. I am planning attend my sister's baby shower function at Orlando, help me in booking my fight ticket with price limit of 500.

ASSISTANT: Sure, I am happy to help you. Can I know your travelling dates please?

USER: My travelling dates are from 08/19 to 08/21.

ASSISTANT: Please provide your boarding and landing points?

USER: My boarding and landing airport codes are from NV-LAS to FL-MCO.

ASSISTANT: Do you have any connection limit?

USER: I need a break in between the journey.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for your patience, there is no flight found on your given details.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thanks for connecting us.