You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: Ashley Davis here.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation on your name.

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

ASSISTANT: Thank you for reaching us.