You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my reservation due to some problems I am unable to travel on those dates. Can you help me in this?

ASSISTANT: Sure, may I know your name?

USER: I am Eric Robinson.

ASSISTANT: Sorry Eric Robinson, no reservation found on your name.

USER: Ok.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the information.