You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, firstly may I know your name please?

USER: Myself Robert Gonzalez.

ASSISTANT: How can I assist you now?

USER: Can you please book a flight ticket from ATL to IAD locations?

ASSISTANT: Ok, may I know the travelling dates please?

USER: My travelling dates are from 10/26 and 10/28.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Robert, there are no flights found on your request.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for approaching us, have a nice day.