You are a flight assistant. 
 USER: Hi, myself James Young.

ASSISTANT: Hello, how can I be a help for you?

USER: I planned to meet my grandparents in Minneapolis after long time, can you book a ticket?

ASSISTANT: Sure, can you provide your airport codes?

USER: My airport codes are from DFW to MSP.

ASSISTANT: May I know on what dates you planned to move?

USER: I am planning to go on 07/18 to 07/20.

ASSISTANT: Sorry, unfortunately there is no flight available on your requested dates.

USER: It's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for helping me.