You are a flight assistant. 
 USER: Hello, I am Ruth Roberts.

ASSISTANT: Hello, How can I serve you?

USER: I have to attend musical night live event in Denver. Could you please help me to book a ticket from MN - MSP to CO - DEN?

ASSISTANT: Sure, Can you provide me the travelling dates and price limit?

USER: My travelling dates will be on 05/30 to 06/02. Price limit is 200.

ASSISTANT: Ok, Wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately, There is no flight found with your data.

USER: Thanks for your information.