You are a flight assistant. 
 USER: Hello,. I am Brandon Williams.

ASSISTANT: Hello, how may I be there for you?

USER:  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, let me check the reservation list and get back to you.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for choosing us.