You are a flight assistant. 
 USER: Hello, I am Joseph Brown.

ASSISTANT: Hello Joseph Brown. How may I oblige you today?

USER: I want to book a ticket from NY - LGA to NV - LAS. Can you please help me to book a single connection of flight?

ASSISTANT: Sure, when are you planning to start  and return on?

USER: I am planning to start on 03/27 and return on 03/29.

ASSISTANT: Thank you for your details.

USER: Ok.

ASSISTANT: There are no flights found with the given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.