You are a flight assistant. 
 USER: Hi, I am Richard Thomas.

ASSISTANT: Hello. How can I serve you?

USER: I have my NBA tournament on 03/10. Can you book me a flight ticket from 03/09 to 03/11?

ASSISTANT: Sure, may I Know airport codes?

USER: My origin is Denver, CO - DEN and destination is Los Angeles, CA - LAX.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 connection.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting. Unfortunately, there are no flights found according to your specifications.

USER: Ok, no wories. Thanks for your response.

ASSISTANT: Thank you for choosing us.