You are a flight assistant. 
 USER: Hello. I am Rachel Thomas.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Due to some technical issues, my plan to attend for a seminar got postponed.

ASSISTANT: Ok.

USER: Will you help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no acive reservation found on your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for approaching us.