You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a ticket from EWR to HOU. Could you book a ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: Travel dates are from Dec, 5 till Dec, 7.

ASSISTANT: Ok, do you have any preferences?

USER: I prefer business class.

ASSISTANT: Ok, is there any requirements?

USER: I need direct flight.

ASSISTANT: Please help me with your name.

USER: My name is Amy Brown.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.