You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Due to sudden demise of my grand mother, I want to change my reservation. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: Sure, Jessica Parker here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any reservation by your name in our data base.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.