You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to go to Denver with my friend, so please help me to book a flight ticket.

ASSISTANT: May I know your airport codes?

USER: The airport codes are from MSP to DEN.

ASSISTANT: May I know your trip dates?

USER: The trip dates are 06/01 and 06/03. Please make sure that the price should not exceed 200 and the connection is 1.

ASSISTANT: May I know your name for further proceedings?

USER: My name is Donna Garcia.

ASSISTANT: Sorry Garcia, there is no flight found for you.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.