You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Scott Campbell here.

ASSISTANT: How can I assist you for today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Yes, I can help you. Give me a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for contacting us.