You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I have to change my flight ticket reservation due to some important work, ca you please help me?

ASSISTANT: Sure, I will help you in changing, please hold on for a moment to check your reservation status.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Michelle Garcia.

ASSISTANT: Garcia, I did not find any active reservation with your name in my database.

USER: Ok, that's fine, thank you for your help.

ASSISTANT: It's my pleasure.