You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency I had to request for this change reservation, Can you please help me in that?

ASSISTANT: Sure, may I know your good name?

USER: My name is Jack Clark.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.