You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Helen Smith.

ASSISTANT: How can I assist you?

USER: I would like to visit HOU from DEN, please book me a plane ticket in that route.

ASSISTANT: Sure, I will help you with that, can you please share your travelling dates?

USER: Sure, my planned travelling dates could be from 07/31 to 08/02. I need 0 connected flight.

ASSISTANT: Please wait for a moment, I will get back with your details.

USER: Ok.

ASSISTANT: I am sorry to say that there is no direct flight on your route.

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us, have a great day.