You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Lisa Roberts.

ASSISTANT: How can I amend you today?

USER:  Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Will you help me in changing my reservation?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Please, stay online.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found on your name Lisa Roberts.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for availing us.