You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Carolyn White here. I would like to change my recent reservation because of some personal work, can you help me to change that reservation?

ASSISTANT: Ok, please wait for a while I will let you know the current status of your reservation.

USER: Sure, take your own time.

ASSISTANT: There is no reservation found under your name to change it.

USER: That's fine, thanks for your help and valuable information.

ASSISTANT: My pleasure. Thanks for approaching us.