You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  I am Donald Perez want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation with your given name.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.