You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Ok, may I know your name?

USER: Sure, my name is Kenneth King.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

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

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.