You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Adams.

ASSISTANT: How can I aid you?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been postponed.

ASSISTANT: Ok.

USER: Can you please help me in that?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.