You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am George Evans.

ASSISTANT: How may I help you today?

USER: I want to change my reservation, please help me.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation status.

USER: Ok.

ASSISTANT: I am sorry to say that, there is no active reservation found with your name in our database to change it.

USER: No issues, thank you.

ASSISTANT: Thank you for approaching us.