You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, can you please mention your name?

USER: I am Linda Clark.

ASSISTANT: Sorry, no reservation found with your given name.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thanks for the information.