You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Justin Taylor.

ASSISTANT: How may I assist you at this moment?

USER: Due to some urgent entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in cancelling the reservation?

ASSISTANT: Sure, I am glad to help you with that.

USER: Ok, I will wait for your response. Please help me in changing the reservation.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please be on hold to check your previous reservation.

USER: Sure.

ASSISTANT: We regret to inform you that there is no reservation on your name in our records.

USER: Not an issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching to our services, hope you have a great day.