You are a flight assistant. 
 USER: Hi. I am Timothy Roberts.

ASSISTANT: Hello, do you need any help from us?

USER: Make a reservation for me from DFW to MSP, to meet my school teacher.

ASSISTANT: I understand your request and will be happy to help you.

USER: Thanks.

ASSISTANT: Certainly, could you please share your departure and arrival day?

USER: Sure, my travelling dates should be 12/15 and 12/17.

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

USER: It's ok, thanks for your information.

ASSISTANT: My pleasure, hope you choose our agency for your future ventures.