You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sharon Jones here.

ASSISTANT: How can I assist you today?

USER: Due to heavy floods in Minneapolis I have postponed my trip to visit there. So can you change my flight ticket reservation?

ASSISTANT: Sure, will you please give me a moment?

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, not a problem. May it is not booked properly. Thank you.

ASSISTANT: Welcome, have a great day.