You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Carolyn Rodriguez, can you help me to book a flight from BOS to MCO?

ASSISTANT: Sure, may I know your trip dates?

USER: My preferable dates are 10/25 and 10/27.

ASSISTANT: There is no flight available.

USER: That is fine. Thank you for your help.

ASSISTANT: Most welcome.