You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you for today?

USER: Can you reserve a ticket from DTW to IAH on 09/25, could you help me?

ASSISTANT: Sure, can you tell me your return dates?

USER: My return journey is on 09/27.

ASSISTANT: Sorry, there is no flight with your name.

USER: Ok, no problem, thank you for your information in searching flights.

ASSISTANT: It's ok. Can I know your name.

USER: My name is Ronald Anderson.

ASSISTANT: Thank you.

USER: Welcome.