You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I would like to book a ticket to attend a meeting at HOU. Can you please help me out to book a ticket from ORD?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I am planning to travel on July 14 and return back on July 16.

ASSISTANT: Ok, may I know your airline preference?

USER: Yes, I am looking for a normal cost airline.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am looking for a direct flight.

ASSISTANT: Ok, could I have your name please?

USER: Yes, I am Raymond Smith.

ASSISTANT: Sorry, there is no flight with your request.

USER: That's fine, thank you for your service.

ASSISTANT: You are welcome, have a great day.