You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

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

USER: Jacob Taylor here.

ASSISTANT: Sorry to inform that, there is no reservation found on you given name.

USER: No problem, Thanks for the information.

ASSISTANT: Thanks for reaching us, have a nice day.