You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Frank Anderson. Can you assist me in booking a flight ticket from MCO to SFO?

ASSISTANT: Sure, can you please share your travel dates?

USER: I am planning to travel on Dec 14 and return on Dec 16.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Frank Anderson, I am sorry to inform you that there is no flight available at your request.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.