You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, can I know your name?

USER: Samantha Robinson here.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.