You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to heavy rains, I want to cancel my reservation.Can you please help me out?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: On which name ticket has been reserved?

USER: Ticket has been reserved on the name of Christopher Thomas.

ASSISTANT: Sorry, there is no reservation is showing in our data base to cancel.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Welcome.