You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

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

ASSISTANT: Sure, l will help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: My name is James Clark.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no active reservation found on your name to change.

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

ASSISTANT: Thank you for approaching us.