You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please assist me with changing my previous reservation now?

ASSISTANT: Sure, may I know your good name?

USER: My name is Katherine King, please check with my booking status.

ASSISTANT: Please wait.

USER: Ok, I will be waiting for your response.

ASSISTANT: There is no reservation found on your name.

USER: Oh! That's very sad to know. Thank you for checking anyways.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.