You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you change my recent reservation?

ASSISTANT: Sure, may I know your good name?

USER: My name is Robert Baker.

ASSISTANT:  Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: Ok, Not an issue. Thank you.

ASSISTANT:  Thank you for opting us.