You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you help me to book a flight ticket from IAH to LAX?

ASSISTANT: Sure, I am glad to help you. May I know your journey dates?

USER: My travelling dates are 27 and 29 of Nov.

ASSISTANT: Ok, please share your class preference.

USER: No.

ASSISTANT: Can I have your name please?

USER: I am Stephanie Adams.

ASSISTANT: Do you have any other concerns to say?

USER: I need a direct flight.

ASSISTANT: Sorry to say that, no flights are found based on your information.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.