You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Debra White. Actually, I booked a ticket to JFK for a sports event but due to bad weather, the event is postponed.

ASSISTANT: Ok, so would you like me to change your existing reservation?

USER: Yes, can you help me out?

ASSISTANT: Yes, please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation previously done with your name.

USER: vfThat's ok.

ASSISTANT: Thank you, have a nice day.

USER: Thank you for your time.