You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to attend a event in Atlanta, can you book the flight ticket for me?

ASSISTANT: Sure, can you please help me with your airport codes?

USER: My location airport codes are from DFW to ATL.

ASSISTANT: May I know your journey dates and airport codes?

USER: My planned trip dates are from 08/09 till 08/11.

ASSISTANT: May I know your name?

USER: Myself Charles Garcia.

ASSISTANT: Thank you for your details. Sorry, we did not found any flight based on your given details.

USER: It's my pleasure. That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.