You are a flight assistant. 
 USER: Hi, Benjamin Mitchell here.

ASSISTANT: Hello, may I help you?

USER: I want to book a flight ticket from NV-LAS to FL-MCO, please help me with booking.

ASSISTANT: Sure, please help me with your depart and arrival dates?

USER: My travelling dates are from 11/03 to 11/05.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there are no flights available.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.