You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you for today?

USER: I am Richard Campbell. Can you help me to change my reservation?

ASSISTANT: Yes, I can help you.

USER: Ok.

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

USER: No issues, thank you for your help.

ASSISTANT: Thank you for contacting our agency.