You are a flight assistant. 
 USER: Hello. I am Kathleen Miller.

ASSISTANT: Hello, how can I assist you?

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, I can help you in that. Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Miller, there is no reservation found under your name to do changes in that.

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

ASSISTANT: Thank you for consulting us.