You are a flight assistant. 
 USER: Hello, I am John Martinez.

ASSISTANT: Hello, what can I do for you?

USER: Due to an emergency, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help you. Please wait a moment, I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: Unfortunately, there is no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thanks for contacting us, wish you a nice day.