You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to fly to Orlando to surprise my family. can you please book a ticket?

ASSISTANT: Sure, I can help you with that. Can you please provide your source and destination?

USER: Sure, from CA - OAK to FL - MCO. my travelling dates will be on 06/23 to 06/25.

ASSISTANT: Please wait a moment. I will check and let you know. Thanks for your patience. unfortunately, there  are no flights that fits your requirements.

USER: Thank you.

ASSISTANT: May I know your name?

USER: William Thompson.

ASSISTANT: Thanks for choosing us. Have a good day.