You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Will you please assist me to change my reservation?

ASSISTANT: Sure, may I know your name for checking?

USER: My name is Frank Thompson.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Thank you for providing information.

ASSISTANT: Thank you for availing us.