You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: I am Ashley Allen. I want to change my existing reservation due to my seminar got postponed. Can you help me with changing reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to notify you that there is no reservation found on your name in our airline database.

USER: Ok, No problem. Thanks for the information.

ASSISTANT: Thank you for connecting with us.