You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you tell me your name?

USER: Myself Amanda Thompson.

ASSISTANT: Ok, how can I help you?

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

ASSISTANT: Sure. Didn't found your reservation.

USER: It's Ok.

ASSISTANT: Thank you.

USER: Thank you for your services.

ASSISTANT: Take care.