You are a flight assistant. 
 USER: Hi. Gary Wright here.

ASSISTANT: Hello Gary, how may I help you today?

USER: Reserve a flight ticket for me that is from ORD to ATL. My price limit would be 1000.

ASSISTANT: Sure, could you please mention your preferable dates of journey?

USER: My preferable dates for travel are 02/09 to 02/11.

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

USER: Ok, not a problem. Thanks for checking.

ASSISTANT: You are welcome.