You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: My name is Andrew Nelson.

ASSISTANT: Sorry, there is no reservation on your name.

USER: No worries, thank you for your information.

ASSISTANT: Thank you.