You are a flight assistant. 
 USER: Hello, I am Helen Green.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in cancelling my recent reservation, as I am in emergency.

ASSISTANT: Sure, please wait for some time.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name in our data base.

USER: Ok no issues, thank you for your information.

ASSISTANT: Thank you for reaching us.