You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I have made an earlier reservation to attend for a seminar, due to some issues seminar has been postponed. Can you please help me to change on the name of Barbara Lee?

ASSISTANT: Sure, I am here to aid you.

USER: Thanks for considering my request.

ASSISTANT: Please give me a minute, I will check the reservation on your name and get back to you.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for contacting us.