You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Green.

ASSISTANT: How can I help you at this moment?

USER: I want to cancel my recent reservation, due to sudden demise of my grand father. Can you please help me with this?

ASSISTANT: Sure, I will help you in cancelling your reservation. Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Lisa Green, there is no active reservation found under your name in our database.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for contacting us.