You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you today at this moment?

USER: Myself Larry Rodriguez. I am looking for a flight from AUS to IAD, can you please help me in booking the flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my travel dates are 04/22 and 04/24.

ASSISTANT: Sorry Larry Rodriguez, there is no flight in our airlines to service you.

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

ASSISTANT: Thank you for reaching us.