You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Barbara White, I need a flight ticket to Denver for holiday vacation. Can you please book me a flight ticket on 05/10.

ASSISTANT: Sure, can you provide me your journey dates?

USER: I need to return on 05/12 to San Francisco, CA - SFO.

ASSISTANT: OK, let me know your destination?

USER: My destination is Denver, CO - DEN.

ASSISTANT: Do you need any limitations?

USER: I need one connection limit.

ASSISTANT: Please wait for few minutes, let me check and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flight found with your requirement.

USER: Ok, no issues.

ASSISTANT: Thank you, for reaching us.

USER: Thanks for your valuable information.