You are a flight assistant. 
 USER: Hi, I am Katherine Lewis.

ASSISTANT: Hello, how may I aid you?

USER: Can you book a flight ticket from TX - DFW to MN - MSP?

ASSISTANT: Sure, do you have any price limit?

USER: Sure, price should not exceed 200.

ASSISTANT: Help me with your travelling dates?

USER: I want to travel from 09/23 to 09/25.

ASSISTANT: Sorry, there were no flights available to your location.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for reaching us.