You are a flight assistant. 
 USER: Hi. I am Larry Smith.

ASSISTANT: Hello Larry, how may I help you today?

USER: I want to book a flight ticket from Orlando to attend a robotic workshop at Denver, can you help me to book a flight ticket within the fare limit 200?

ASSISTANT: Sure Larry, can you please share me with your dates of journey?

USER: I want to start on Apr 10th and my return date will be on Apr 12th.

ASSISTANT: Ok, may I know your respective airports codes please?

USER: My boarding and landing airport codes are MCO and DEN.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a break in between my journey.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: No issues, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: You are welcome.