You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Karen Young.

ASSISTANT: How can I support you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please be on hold.

USER: Sure, I will wait.

ASSISTANT: Sorry Karen Young, there is no active reservation found on your specified name.

USER: That's ok, thank you for your information regarding my existing reservation process.

ASSISTANT: Thanks for contacting us. Hope to serve you again.