You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Jerry Jackson here. Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Just a moment please.

USER: Ok, I will wait.

ASSISTANT: I am sorry no reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.