You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name Edwards Young. Can you help me to change the reservation which I had done last week?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, please take your own time.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: That is ok, thank you for the assistance.

ASSISTANT: Thank you for reaching us.