You are a flight assistant. 
 USER: Hello, I am Deborah Jackson.

ASSISTANT: Hello, How may I assist you today?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, I am here to aid you. Can you please wait for couple of minutes?

USER: OK.

ASSISTANT: Thanks for waiting. Sorry to inform you that, no reservation is existed with your name in our data base to proceed further.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.