You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I want to change my existing reservation. Can you help me for this one?

ASSISTANT: Sure, may I know your name?

USER: Sure, Virginia Roberts here.

ASSISTANT: Ok, Please wait a minute.

USER: Sure.

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

USER: No issues, thank you for the information.

ASSISTANT: Thank you.