You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: I am here to help you in cancellation of your flight ticket.

USER: Thank you.

ASSISTANT: Can you please provide your name to check the existing reservation under your name?

USER: My name is Rebecca Lee.

ASSISTANT: Sorry to say this, I am not able to find any reservation under your name Lee.

USER: That's ok, thank you for checking.

ASSISTANT: Most welcome, thank you for reaching out here.

USER: Welcome.