You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I want to book a flight from HOU to attend a meeting with client. Can you book a flight for me?

ASSISTANT: Sure, I am happy to help you. Can I have your trip dates?

USER: I will travel on Sept 28 and return on Sept 30.

ASSISTANT: Please help me with your destination airport code.

USER: My destination point is IAH.

ASSISTANT: Do you have any connection limit for this trip?

USER: I want a direct flight.

ASSISTANT: Is there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name please?

USER: My name is Sarah Mitchell.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing us.