You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, please tell me for what assistance you reached us?

USER: I had booked a ticket to start my new office in Chicago, but due to weather conditions the program got postponed, can you please alter my existing booking?

ASSISTANT: Sure, I am glad to help you. Could you please tell me your good name?

USER: Sure, the recent booking is done on Katherine Brown name.

ASSISTANT: Ok Brown, please wait for a while it may take few minutes.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, I haven't found your previous reservation in our portal to change further. Do you need any other help, I am glad to help you?

USER: That's fine, no problem with that one. Thank you for your quick response. No, that's it.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thank you.