You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, we are here to help you. May I know your good name?

USER: Mark Wilson here.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

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

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.