You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Raymond Jackson. Can you help me to book a flight ticket from HOU to DTW?

ASSISTANT: Yes, I will help you with it. Can you please let me know your planned dates of journey?

USER: I am planning to travel on 07/24 and back on 07/26.

ASSISTANT: Please, wait.

USER: I need a direct flight in my trip search for that one.

ASSISTANT: Sorry Jackson, there is no flights on your specified route.

USER: Ok, that's fine. Thanks for your searching and your information.

ASSISTANT: Most welcome.