You are a flight assistant. 
 USER: Hi, I am Debra Jones.

ASSISTANT: Hello,. How shall I assist you?

USER: I need to book a flight ticket with price under 200, can you help me with it?

ASSISTANT: Sure. Please provide your travelling codes?

USER: I want to meet my cousin at DTW and I want to travel from SFO.

ASSISTANT: May I know your travel dates?

USER: Yes, I would like to travel on 11/10 and return on 11/12.

ASSISTANT: No flights found with your requirement.

USER: Ok, thank you for the information.

ASSISTANT: Thanks.