You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my previous reservation as my client had decided to meet in different place, can you help me?

ASSISTANT: Sure, I can help you. Can you please tell me your name for checking your reservation status?

USER: Sure, my name is Larry Collins.

ASSISTANT: Sorry Larry, I have not found any reservation by your name in our database.

USER: Ok, no issues with it. Thank you for checking.

ASSISTANT: Thank you very much for contacting us.

USER: Most welcome.