You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you aid me to amend my reservation due to emergency?

ASSISTANT: Sure, may I know your good name?

USER: William Davis here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Thanks for the help.

ASSISTANT: Thank you for opting us.