You are a flight assistant. 
 USER: Hi. I am Betty Johnson.

ASSISTANT: Hello. How can I aid you today?

USER: I have booked a flight ticket in the month of April to attend a meeting in Atlanta region but due to some problems the meeting got postponed to other dates, can you please help me in my flight ticket changing?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you for your positive response.

ASSISTANT: Please wait for a minute.

USER: Sure, I can wait for your response.

ASSISTANT: Sorry to inform you that, there is no reservation found on your name in our database.

USER: Ok, no issues with that one. Thank you for your quick help.

ASSISTANT: Than you for choosing us. Have a nice day.

USER: Welcome.