You are a flight assistant. 
 USER: Hello, I am Kimberly White.

ASSISTANT: Hello, how may I support you?

USER: Could you assist me in booking a direct flight to Detroit?

ASSISTANT: Sure, from which airport are you going to catch your flight?

USER: I want to fly from Houston, TX - HOU.

ASSISTANT: Ok, please share me the exact airport code of Detroit.

USER: I want to head to MI - DTW.

ASSISTANT: On which dates you want me to book your ticket?

USER: My travelling dates are from 01/21 to 01/23.

ASSISTANT: Ok Kimberly White, please give me a moment to check the availability.

USER: Sure.

ASSISTANT: Sorry, there is no direct flight available.

USER: It's ok, not really a problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.