You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me to book my brother's ticket? He want to meet his friend in Minneapolis.

ASSISTANT: Sure I am here to help you may I know your brother name for further proceedings?

USER: Thank you, his name is Patrick Thompson.

ASSISTANT: Let me know your brother planned dates to find a flight for him.

USER: Sure, he want to depart on 06/13 and return on 06/15.

ASSISTANT: May I know his airport codes?

USER: Please check for the best flight from JFK to MSP.

ASSISTANT: Please wait a moment, let me check the availability.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flight for him on his preferable dates.

USER: So sad to hear that, anyway thank you for the information.

ASSISTANT: Ok, thanks for consulting us.