You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help are you seeking from our side?

USER: My name is Samantha Johnson and I want to change my reservation. Can you please help me?

ASSISTANT: I am here to help you. Please allow me to check your name in our reservation list for a moment.

USER: Sure.

ASSISTANT: Samantha Johnson, thank you for waiting. I am very sorry to inform you, there is no active reservation found by your name in the reservation list.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for connecting with our agency services. \. Have a nice day.