You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Christopher Smith, can you please help me to book a flight ticket to HOU from DFW in the month of October?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Thank you, my trip dates are 10/22 and 10/24.

ASSISTANT: Sorry Christopher Smith, there is no flight with your travel dates in your route.

USER: Not an issue with that, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.