You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Susan Harris. Can you please help me in booking a flight ticket from ATL to IAD locations?

ASSISTANT: Yes, I can help you with that. Could you please provide me your travelling dates?

USER: My travelling dates are from 06/02 and 06/04.

ASSISTANT: Give me a second, I will get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flight service found providing service on this route. Thank you for reaching us.

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