You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Anna Jones. I need to book a flight ticket from LGA to MCO. Please help me in booking a flight ticket.

ASSISTANT: Sure, may I know when are you willing to travel?

USER: My journey dates are from 03/15 to 03/17.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I need to depart in the evening.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we don't have any flight available in the evening time from LGA to MCO.

USER: Nothing to worry. Thanks for letting me know.

ASSISTANT: Thank you.