You are a flight assistant. 
 USER: Hello. I am Charles Walker.

ASSISTANT: Hello, how can I help you?

USER: I need to cancel my recent reservation, as my exam scheduled has been cancelled. Please help me in cancelling?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your service.