You are a flight assistant. 
 USER: Hi, I am Katherine Brown.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to attend a food festival in San Francisco, so can you please help me in booking a flight ticket from Denver?

ASSISTANT: Sure, I am here to help you. Can you please share your airport codes?

USER: Sure, my airport codes are CO-DEN and CA-SFO.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I need a stopover in between the journey.

ASSISTANT: On which dates you would like to travel?

USER: I would like to travel on 01/27 and intend to return on the date 01/29.

ASSISTANT: How much can you afford for this particular plane ticket?

USER: I can afford up to 200 for this particular journey.

ASSISTANT: Thank you for providing your journey details. Unfortunately, there is no flight found matching to your requirements.

USER: That's ok. Thanks for the help.

ASSISTANT: Thank you for availing us.