You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Joshua Young, want to alter my recent reservation due to some emergency. Please help me out with that.

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry, we couldn't find any reservation on your name in our records.

USER: It's ok, thank you.

ASSISTANT: Thank you for approaching us.