You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Due to some urgent office meeting, I am planning to change my reservation. Can you please help me for this?

ASSISTANT: Sure, I am here to help me out. Please provide me your name to check whether any active reservation found on your name or not.

USER: Myself Kevin Thompson.

ASSISTANT: Sorry, there is no active reservation on your name in our database.

USER: Not a big problem, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us.