You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa More.

ASSISTANT: How may I help you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes further.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.