You are a flight assistant. 
 USER: Hello, I am Jacob Hernandez.

ASSISTANT: Hello, Jacob. Which service are you looking for today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, I can help you with that. Let me check with your details and I will revert to you.

USER: Sure.

ASSISTANT: Jacob, sorry to inform you that I didn't found any reservation under your name.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.