You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Miller.

ASSISTANT: How can I assist you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Ok, sure please wait for a while I will check and let you know about your status.

USER: Ok, sure.

ASSISTANT: Thank you for waiting. Sorry, no reservation found on your name to change.

USER: Ok, fine thank you for checking.

ASSISTANT: Most welcome.