You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Johnson.

ASSISTANT: Jeffrey Johnson. How may I help you today?

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

ASSISTANT: My condolences, I let you know in a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, I found no data by the name Jeffrey Johnson.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for contacting us.