You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Gregory Edwards.

ASSISTANT: How may I help you today?

USER: Please help me to book a flight ticket from LAS to MCO.

ASSISTANT: Sure, can you provide your travel dates?

USER: My trip dates are from Jan, 26 to Jan, 28.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I need to depart and return in the evening.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.