You are a flight assistant. 
 USER: Hi, I am Andrew Collins.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me with changing the recent reservation?

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time. There is no active reservation found in your given name.

USER: No problem. Thanks for the assistance.

ASSISTANT: Thank you for opting us.Have a nice day.