You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Welcome to flight booking agency, how can I assist you at this moment?

USER: My grandfather told me to cancel his reservation because he is suffering from severe leg pain. Can you please help me to cancel his reservation?

ASSISTANT: Sad to hear that, I will help you with cancelling the reservation.

USER: Thank you very much.

ASSISTANT: For checking your reservation, can you please let me know your grandfather's name?

USER: The reservation was done on the name of Paul Thompson.

ASSISTANT: Give me a moment to check the reservation status in our database.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your patience, there is no active reservation found with the name Paul Thompson in our database to cancel it.

USER: Not an issue, my father might have cancelled it. Anyway thank you for checking.

ASSISTANT: Thank you for contacting us, hope you visit us again.

USER: You are welcome.