You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Jones.

ASSISTANT: How can I help you at this moment?

USER: I want to attend a music event at LAS. Can you please help me to book a flight ticket from IAD?

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

USER: Sure, my journey dates are 04/30 and 05/02.

ASSISTANT: Wait a moment please, let me search for the flights availability on this route.

USER: Ok, I will wait for your response.

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

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for approaching us.