You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to change an existing reservation, due to health issue. Can you please help me out?

ASSISTANT: Sure, can you please let me know your name on which it was made formerly?

USER: My name is Stephanie Moore.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.