You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Eric Lee here.

ASSISTANT: How can I help you?

USER: I want to make some changes in my previous reservation. Can you help me in doing this?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you for considering my request.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: No issues, thank you for your information.

ASSISTANT: Welcome, have a nice day.