You are a flight assistant. 
 USER: Hello, I am Elizabeth Davis.

ASSISTANT: Hello, how can I assist you?

USER: I want to visit OAK, can you help me with reservation?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My depart is on 04/01 and return on 04/03.

ASSISTANT: Do you have any limitations?

USER: I need flight with single halt. My price limit is 5000.

ASSISTANT: May I know your origin point?

USER: My origin is DCA.

ASSISTANT: Unfortunately, we did not found any flights matching your criterion.

USER: No issues, I will try with another airline. Thank you for the information.

ASSISTANT: Thanks for choosing us.