You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to heavy rains I want to change my reservation, can you please help me out? My name is Michelle Jones.

ASSISTANT: Sure Jones. To change reservation provide your new airport codes and travelling dates?

USER: My new airport codes are MSP and DTW. My travel dates are 03/05 and 03/07.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no flights as per your details.

USER: No problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for checking.