You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your assistance?

USER: I want to change my existing reservation due to sudden change in my family trip dates. Can you help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: I am Jessica King.

ASSISTANT: Please wait for a minute, I will revert to you with current status.

USER: Sure.

ASSISTANT: Unfortunately, there is no reservation found with your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thanks for availing us.