You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: David Taylor here.

ASSISTANT: Glad to meet you David Taylor.

USER: Due to some health issue, I want to quit my trip. Can you please cancel my reservation?

ASSISTANT: Sure, I will help you with cancelling your reservation if it is available now. Please be hold on for a moment and I will check your reservation status,.

USER: Ok, please check it.

ASSISTANT: Thank you for waiting. Sorry David Taylor, no reservation has found under your name to cancel.

USER: Oh! May be friend has already cancelled it, thank you for your information.

ASSISTANT: My pleasure. Thank you for choosing us, have a good day.