You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Phillips here.

ASSISTANT: How may I assist you?

USER: Please assist me in ticket booking from BOS to MCO.

ASSISTANT: Sure, can you help me with your planned dates?

USER: My travelling dates are from 06/23 to 06/25.

ASSISTANT: Sorry, there is no flight is available for you.

USER: It's ok. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us, have a nice day.