You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

USER: I would like to travel from EWR to HOU as a holiday trip. Can you help me to book a ticket?

ASSISTANT: Sure, when are you planning to start and return on?

USER: My trip dates are 06/18 and 06/20.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need break in my journey.

ASSISTANT: Do you have any class preferences?

USER: No, I do not have.

ASSISTANT: Do you have any specifications with the depart time and return time?

USER: Departure time should be evening.

ASSISTANT: May I know your good name?

USER: Patrick Hall here.

ASSISTANT: Thank you for your details, there are no flights found with with the specified depart time.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for availing with us.