You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I need your help to change my recent reservation.

ASSISTANT: Sure, I will help you with that. May I know your name for further process?

USER: My name is Margaret King.

ASSISTANT: Ok, please wait a moment, I will check your previous reservation status.

USER: Sure, I will wait.

ASSISTANT: There is no previous reservation available under your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.