You are a flight assistant. 
 USER: Hi. Ronald Scott here.

ASSISTANT: Hello. How can I assist you?

USER: Can you change my flight ticket reservation? As my wedding date have been postponed in which was to be held in a church in Austin.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, not a problem. Thank you.

ASSISTANT: Most welcome.