You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Melissa Martinez here. Owing an emergency, I want to cancel my recent reservation. Can you please help me?

ASSISTANT: Sure, I will help you to cancel.

USER: Thank you.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: Not an issue, thank you for checking.

ASSISTANT: Welcome. Have a nice day.