You are a flight assistant. 
 USER: Hello, I am Emma Thomas.

ASSISTANT: Hello, how can I help you today?

USER: Suddenly, my fashion show has been postponed due to some technical issues. I want to alter my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your given name.

USER: Not an issue, thank you.

ASSISTANT: Thanks for choosing us.