You are a flight assistant. 
 USER: Hello, I am Joshua Clark.

ASSISTANT: Hello, how may I help you?

USER: I need to cancel my recent reservation due to sudden demise of my grand father. Could you please help me in cancellation of ticket?

ASSISTANT: Sure, I am glad to hep you. Please stand by I will revert you.

USER: Sure.

ASSISTANT: Thank you, no reservation found by your name.

USER: Ok, Thank you for your response.

ASSISTANT: Thank you for reaching us, have a nice day.