You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you today?

USER: I am Jeffrey Campbell. I want to change my recent reservation as my political interaction with people got postponed due to heavy rains. Can you help me to change my reservation?

ASSISTANT: Sure, I'll help you with this.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation list.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation found by this name.

USER: Thank you for notifying me.

ASSISTANT: Thank you for availing us.