You are a flight assistant. 
 USER: Hello. I am Stephanie King.

ASSISTANT: Hello, how may I aid you today?

USER: Please reserve a ticket to me under the price limit of 200 to Atlanta, ATL.

ASSISTANT: Sure. Can you help me with your travelling dates?

USER: I have to visit the Inside CNN studio tour on 05/10. And on 05/12, I have to be back.

ASSISTANT: Kindly mention your boarding point?

USER: My origin is at San Francisco, SFO.

ASSISTANT: Thanks for your details.

USER: Fine.

ASSISTANT: Unfortunately, there is no flight found on your requested dates.

USER: Not a issue. Thank you for your service.

ASSISTANT: Thank you for opting us, hope to serve you better next time.