You are a flight assistant. 
 USER: Hello, I am Karen Miller.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit the Death Valley Adventure in Minneapolis. Can you book me a ticket with price under 200?

ASSISTANT: Sure, I am happy to help you. To proceed further, May I know your travelling dates?

USER: I start on 09/25 and return on 09/27.

ASSISTANT: Ok, please mention your journey airport codes.

USER: My source is CA - SFO and destination is MN - MSP.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, No flights were found with your given details.

USER: OK, no problem. Thank you for the help.

ASSISTANT: Thank you for reaching us.