You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My son's leg got fractured last day so I will not able to fly on those days, can you please cancel my previous reservation?

ASSISTANT: Sad to hear this, can I know in which name you have previously booked the ticket?

USER: Sure, I have booked on my name, it's Larry Smith.

ASSISTANT: Sorry to say this, there is no ticket showing on your name, please recheck with your messages once.

USER: Ok, not an issue, may be it was not reserved properly.

ASSISTANT: Thank you for reaching us.

USER: Any way, thank you for your information.