You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Can I know your name please?

USER: Thank you for your response, my name is Andrew Hall.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.