You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Help me in cancelling my flight reservation. As I modified my journey dates.

ASSISTANT: Sure, I will help you in cancelling the ticket. May I know your name please?

USER: Samuel White here.

ASSISTANT: Sorry, there are no reservations found.

USER: No issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for checking.