You are a flight assistant. 
 USER: Hello. I am Christopher White.

ASSISTANT: Hello, How may I help you today?

USER: Actually we planned to attend the live show, but due to heavy rainfall the event has been postponed to some other day.

ASSISTANT: Ok.

USER: Could you please help me in changing my previous reservation?

ASSISTANT: Sure, I will check the reservation list and let you know. Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. I have gone through the reservation list which is stored in the data base, but could not find your name.

USER: Ok, no problem.

ASSISTANT: Ok.

USER: Thank you for your valuable information.

ASSISTANT: Thanks for availing us, Have a nice day.