You are a flight assistant. 
 USER: Hello. I am Carolyn White.

ASSISTANT: Hello. How may I assist you today?

USER: I had planned to go on a trip, but it was postponed due to some reasons. Can you change my recent reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching our service.