You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Jeffrey Rodriguez here. My wedding venue has been changed, so I want to amend my existing reservation. Could you help me out?

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: There is no reservation found under your name in our database.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for opting us.