You are a flight assistant. 
 USER: Hi,. I am Eric Hernandez.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me with that?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.