You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Green.

ASSISTANT: How may I guide you today?

USER: I want to attend a wedding in Austin. Can you book a flight ticket from ATL to AUS?

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

USER: I want to travel in the flight on 11/09 and 11/11.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us.