You are a flight assistant. 
 USER: Hello. I am Ronald Edwards.

ASSISTANT:  Hello, How exactly I can serve you the best 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, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

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

ASSISTANT: Thank you for choosing us.