You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Raymond Baker, want to alter my recent reservation due to some personal problem. Please help me out with that.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry baker, there is no reservation found with your name in our records.

USER: It's ok, no issue. Anyway, thank you for your help.

ASSISTANT: You are welcome.