You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Brenda Gonzalez, want to travel from BOS to MCO. Can you please help me in ticket booking?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 07/12 to 07/14.

ASSISTANT: Do you have any class preference?

USER: Yes, I have my class preference which is economy class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: It's ok, thank you.

ASSISTANT: Most welcome.