You are a flight assistant. 
 USER: Hi. I am Brian Turner.

ASSISTANT: Hello. How can I help 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 reservation?

ASSISTANT: Ok, please wait. Sorry, no reservation was found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT:  Thank you for availing us.