You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I am ready to help you. Please can I know your name to check the reservation?

USER: Thanks. My name is Carol Phillips.

ASSISTANT: Ok, please be on a hold.

USER: Sure.

ASSISTANT: Sorry to say that, there are no reservation found on your name. Have a nice day.

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

ASSISTANT: Thank you for contacting us.