You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kimberly Mitchell from Houston. I am planning to visit a Times Square in New York, so please book a flight ticket from TX - HOU to NY - LGA.

ASSISTANT: Sure, can I have your trip dates?

USER: My departure day is 11/18, return day is 11/20.

ASSISTANT: We do not found any flights running in your desired routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.