You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Perez.

ASSISTANT: How can I assist you at this moment?

USER: I want to book a flight ticket from LGA to LAS. Please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you with this. Can you please provide your journey dates?

USER: My travel dates are from 03/15 to 03/17.

ASSISTANT: Do you have any specifications for this trip?

USER: I need a halt in between my journey.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Robert Perez, there are no flight services available on this route on your provided dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for contacting us.