You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can aid you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Ruth Evans.

ASSISTANT: There is no reservation found under your name.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.