You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to change my reservation, please help me with it.

ASSISTANT: Can I have your name please?

USER: I am Pamela Lewis.

ASSISTANT: Please give me a moment, I will check your reservation and back to you. Unfortunately, no reservation found on your given name.

USER: Ok. Fine, thanks for the information.

ASSISTANT: Thank you for availing us.