You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Owing an emergency want to change my reservation so, can you please help me out with this?

ASSISTANT: Sure, we are glad to help you. Can you please let me know your good name?

USER: Sure, my name is George Nelson.

ASSISTANT: We are sorry to inform you that, there is no active reservation on your name in our data.

USER:   That's fine, thank you for the response.

ASSISTANT: Thank you for contacting us.