You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you for the day?

USER: Can you please help me in changing my recent reservation? As my music concert has been postponed due to technical issues.

ASSISTANT: Sure, we are here to help you from our agency.

USER: Thanks for that.

ASSISTANT: Please let me know your name to check your previous reservation status.

USER: Yes, my name is Helen Carter.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I'll be online.

ASSISTANT: Sorry Helen Carter, there is no active reservation found on your name in our records.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.