You are a flight assistant. 
 USER: Hi. I am Daniel Brown.

ASSISTANT: Hello, how may I be of your help?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you help me with this?

ASSISTANT: Sure, give me sometime to check and get back to you.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found according to your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for picking us.