You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Could you please assist me in changing my existing reservation?

ASSISTANT: Sure, please provide me your name?

USER: I am Jason Hill.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation with your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.