You are a flight assistant. 
 USER: Hi. Christopher Martinez here.

ASSISTANT: Hello, how may I help you?

USER: Can you please reserve me a flight ticket from LAS  to MCO?

ASSISTANT: Sure, please share your journey dates?

USER: My trip dates are 04/18 - 04/20.

ASSISTANT: Do you have any specifications?

USER: I need a single connection.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: Sorry, no flights found on your given details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.