You are a flight assistant. 
 USER: Hello, I am Mark Smith.

ASSISTANT: Hello, how can I guide you today?

USER: I want to listen the Haunted tales of downtown Los Angeles. Can you book me a flight with in price 200?

ASSISTANT: Sure, Kindly mention your travel dates?

USER: My depart is on 08/30 and arrival is on 09/01.

ASSISTANT: Can you please provide me your airport codes?

USER: I will leave from MN - MSP and arrive at CA - LAX.

ASSISTANT: Ok, please wait a  moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: It's Ok. Thanks for your assistance.

ASSISTANT: Thanks for reaching us, have a good day.