You are a flight assistant. 
 USER: Hi. I am Kevin Phillips.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to MSP from BOS. Can you book under 1000?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: 12/11 and 12/13 are my travelling dates.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: OK.

ASSISTANT: We have not found any flights with your given details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you.