You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: My name is Jessica Walker.

ASSISTANT: Ok.

USER: I want to meet my school friend in New York, NY - EWR, so please book a flight ticket from Houston, TX - HOU.

ASSISTANT: Sure. Please provide your travelling dates in order to book a flight ticket.

USER: My departure day is 08/28, return day is 08/30.

ASSISTANT: Please specify flight connections limit?

USER: I want direct flight.

ASSISTANT: I'm sorry, no direct flight is available at the moment.

USER: No problem, thank you for your service.

ASSISTANT: Thanks. Have a nice day!.