You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Sure, we are here to help you. Can I have your name to proceed further?

USER: John Allen here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no reservation found with provided name.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for opting us.