You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Perez here.

ASSISTANT:  Joseph Perez, how may I assist you today?

USER: I need to cancel my existing reservation, as my planned trip with my friends got cancelled. Can you please help me out?

ASSISTANT: I am sorry to hear that. I will help you.

USER: Thank you for considering my request.

ASSISTANT: Please allow me a minute to check with your details.

USER: Sure, take your own time.

ASSISTANT: Thank you. Joseph Perez, I regret to inform you that there is no reservation done of your name.

USER: Ok, it might be cancelled by my manager but did not inform me yet. Thank you for the information.

ASSISTANT: Ok. Thank you for reaching us. Have a great time, Joseph Perez.