You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know what kind of service you are expecting from us?

USER: Can you please help me to change my reservation to other dates?

ASSISTANT: Sure, we are here to assist you. May I know your good name please?

USER: Sure, my name is Brandon Roberts.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: No issues, thank you.

ASSISTANT: Thanks for approaching us.