You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Samantha Campbell. Please help me with changing my reservation.

ASSISTANT: Sure. Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: That's fine, thanks for the reservation.

ASSISTANT: Thanks for choosing us.