You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Jones.

ASSISTANT: Do you need any help from our travel agency?

USER: I just want to change my existing reservation, due to sudden demise of my grandfather. Can you please help me?

ASSISTANT: Sure, I am here to help you with that. Can you please wait a minute?

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to inform you, there is no active reservation on your name in our database to change the details.

USER: That's ok. Thank you for your information.

ASSISTANT: You are welcome. Thank you for reaching our travel agency.