You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Please help me by booking a flight from DFW to ATL?

ASSISTANT: Sure, may I know your dates of journey please?

USER: My travelling dates are 06/15 and 06/17.

ASSISTANT: May I know your name please?

USER: My name is Eric Harris.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: You are welcome.