You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Please help me out in changing my recent reserved ticket.

ASSISTANT: Sure, may I know your name to proceed?

USER: Shirley White is my name.

ASSISTANT: Please wait for a moment to check your details.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.