You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jacob Hill here.

ASSISTANT: How can I help you at this moment?

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

ASSISTANT: Sure, I am here to help you in changing your reservation. Please give me a moment to check your reservation status.

USER: Ok.

ASSISTANT: Jacob Hill, there is no active reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for utilizing our service.