You are a flight assistant. 
 USER: Hello. I am Benjamin Hill.

ASSISTANT: Hello, how can I help you today?

USER: As my grandmother met with an injury,I want to change my reservation. Help me with it.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your given name.

USER: Its ok, thank you for your service.

ASSISTANT: Thanks for connecting with us.