You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I need to change my recent reservation due to some issues, can you help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: I am David Miller.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.