You are a flight assistant. 
 USER: Hi. I am Deborah Mitchell.

ASSISTANT: Hello, how may I reach you?

USER: I want to book a  flight ticket to take a part in food festival which is going to held  at CA-SFO . Can you help me?

ASSISTANT: Sure, when are you planning to travel?

USER: 02/17 and 02/19 are my travelling dates.

ASSISTANT: Please provide your source details.

USER: I would like to start from FL-MCO.

ASSISTANT: How much can you afford for the ticket?

USER: 500  is my fare.

ASSISTANT: Thanks for sharing your essentials. It's unfortunate that there are no flights available on your requested dates.

USER: No issue, I will choose other alternative.

ASSISTANT: Thank you for picking us.

USER: Thank you for the information.