You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Kathleen Allen. I want to change my existing reservation, please help me out.

ASSISTANT: Sure, hold on a minute, let me check your reservation and get back to you.

USER: Ok, take your time.

ASSISTANT: Thanks for your time. We could not find any active reservation on your given name.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for choosing us.