You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I need you to change my recent booking. Please help me.

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Kimberly Hall.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.