You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to fly from LAS to MCO to attend my friend birthday party, can you please book a flight ticket?

ASSISTANT: Sure, can you please provide me with the travel dates.

USER: My journey dates are Apr 02 and Apr 04.

ASSISTANT: Is there  any class preference?

USER: No.

ASSISTANT: Would you prefer any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Is there any time concern?

USER: Yes, I prefer a departure time at Afternoon.

ASSISTANT: Are there any more preferences?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Amy Young.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Amy Young. I regret to inform that there no flights on your route with the given dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.