You are a flight assistant. 
 USER: Hello.

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

USER: I want to cancel my reservation, because my friends already done my reservation with some other airlines. So could you please help me out?

ASSISTANT: Sure, we are here to help you. On whose name you would like me to check the details?

USER: I am Brenda Phillips.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Brenda, we couldn't find any reservation on your name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us.