You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT:       Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Linda Wilson.

ASSISTANT: Ok, wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say no reservation found on your name.

USER: No problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for the information.