You are a flight assistant. 
 ASSISTANT: Hello,.

USER: Hello, I am Sandra Wright.

ASSISTANT: How may I help you today?

USER: I want to fly from DCA-ATL to meet my Business partner, can you please help me to book a flight ticket?

ASSISTANT: Could you please share me your airport codes?

USER: I already mentioned above.

ASSISTANT: May I know your travelling dates?

USER: Sure, my journey dates are from 03/14 to 03/16.

ASSISTANT: Let me know your price limit.

USER: Yes, it is 500.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Unfortunately, no fight found on your given information.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.