You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you change my flight ticket reservation? As my cricket match has been postponed to some other dates in Chicago.

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: I am Carol Hall.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Carol, there is no reservation found under your name.

USER: Ok, not a problem. Thank you.

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