You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me in this?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Linda Young.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

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

USER: Ok, not a issue. Anyways, thank you for your service.

ASSISTANT: Thank you.