You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: Can you aid me in doing some modifications in my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: On whose name, I have to check the reservation list?

USER: I am Stephen Parker, ticket was booked under my name itself.

ASSISTANT: Please wait for a while.

USER: Take your time.

ASSISTANT: Thanks for your time, we are sorry to inform you that, there is no active reservation found in your name to change.

USER: No issues. Thank you for giving the information.

ASSISTANT: Thank you for availing us.