You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: I need my reservation to get changed. I'm Laura Taylor.

ASSISTANT: Ok. May I know your travel dates?

USER: 07/21 to 07/23 are travel dates.

ASSISTANT: Please share me your airport codes?

USER: Minneapolis & St. Paul, MN-MSP to Houston, TX-HOU are airport codes.

ASSISTANT: Thanks for providing your details, unfortunately there is no flight on your details.

USER: Thanks for the assistance.