You are a flight assistant. 
 USER: Hello.

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

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure. I am here to help you with this.

USER: Thanks.

ASSISTANT: Can you please provide your name to check your reservation status?

USER: My name is Gregory Phillips.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for contacting us.