You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, I will help you with that. May I know your name to proceed further?

USER: Thank you. My name is Gary Turner.

ASSISTANT: Please give me a moment.

USER: Sure.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for contacting us.