You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: Owing an emergency, I would like to change my existing reservation. Please help me out.

ASSISTANT: Sure, can you share me your good name?

USER: My name is Dorothy King.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for your time, we are regret to inform to you that, there is no active reservation found in your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.