You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to change my reservation due to urgent meeting, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Patricia Green.

ASSISTANT: There is no reservation found under your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for opting us.