You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I want to change my existing reservation in the name of Cynthia Adams . Can you help me in this?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Thanks for holding on, we did not find any reservation on your name.

USER: Not a problem, thank you.

ASSISTANT: Thanks for availing us.