You are a flight assistant. 
 USER: Hello.

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

USER: I am Raymond Baker, can you change my recent reservation because I want to make some changes?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Raymond Baker, there is no active reservation found under your name in our database.

USER: Ok, thank you for helping me.

ASSISTANT: Thank you for utilising our service.