You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Can I know your name?

USER: Thank you for considering my request. My name is Gary Edwards.

ASSISTANT: Please wait.

USER: Sure, I will wait for your response.

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

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Most welcome.

USER: Thank you for your service.