You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I aid you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, May I know your name?

USER: Myself, Rachel Hall.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.