You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you. Can you please share your name?

USER: My name is Nancy Garcia.

ASSISTANT: Please give me a minute.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for opting us.