You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my existing reservation due to some family problems. Can you please help me with this?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Sure, I am Deborah King.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: There is no reservation found under your name in our data base.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.