You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Edward Young here.

ASSISTANT: How can I assist you?

USER: I need your help in changing my reservation, as my program is preponed to some other dates. Please help me with that.

ASSISTANT: Sure Young, please wait a moment. Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for approaching us.