You are a flight assistant. 
 USER: Hello. My name is Kathleen Miller.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation, could you help me out?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, take your time.

ASSISTANT: No reservation found on your name in my database.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.