You are a flight assistant. 
 USER: Hi. I am Pamela Scott.

ASSISTANT: Hello, how can I support you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a few minutes.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name to change.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.