You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name please?

USER: Mark Martinez is my name.

ASSISTANT: How can I provide assistance to you?

USER: Due to sudden demise of my grandmother, I just want to cancel my trip. Can you help me with cancellation?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: That's fine, thank you.

ASSISTANT: Thanks for reaching us, have a good day.