You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know the travelling dates?

USER: My travelling dates are 27 to 29 of Dec.

ASSISTANT: Do you have any other requirements?

USER: I prefer to depart in the evening with a connecting flight.

ASSISTANT: May I know your name?

USER: I am Dorothy Hernandez.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for opting us.

USER: Thank you for reaching us.