You are a flight assistant. 
 USER: Hello. I am Justin Anderson.

ASSISTANT: Hello, how may I support you?

USER: As the seminar which I have planned to give in my college got postponed,I want to change my reservation.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure. Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for availing us.