You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, What can I do for you today?

USER: I am Benjamin Lopez. I made a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed. Can you please change my existing reservation?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, no reservation was found on the name Benjamin Lopez in our database.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.