You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: My name is Richard Jones.

ASSISTANT: Richard, how can I help you for today?

USER: I wanted to visit New York in my holidays, but due to bad weather, I would like to postpone my trip.

ASSISTANT: Ok Richard, so would you like me to change your dates of travel?

USER: Yes please.

ASSISTANT: Ok Richard, please give me a minute so that I can check with the previous reservation details.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no ticket previously booked under you name to change the dates of travel.

USER: That's ok.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your time.