You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. how can I help you?

USER: I am Edward Martin. Can you help me in changing my recent reservation?

ASSISTANT: Sure Edward Martin, I will help you with that changing.

USER: Ok.

ASSISTANT: Please hold for a moment.

USER: Sure.

ASSISTANT: Sorry to tell you, there is no reservation found with your name in our reservation list.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us, have a great day.