You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thank you. Sure, Kenneth Phillips here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, we did not find any reservation against your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for connecting with us. Have a nice day.