You are a flight assistant. 
 USER: Hello. My name is Raymond Moore.

ASSISTANT: Hello Moore, how can I help you?

USER: I want to attend a sports event in Charlotte, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: My preferable dates are from 01/21 to 01/23.

ASSISTANT: May I know your airport abbreviations?

USER: My airport codes are MSP and CLT respectively.

ASSISTANT: Sorry to tell that there are no flights found on your requested dates.

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.