You are a flight assistant. 
 USER: Hello.

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

USER: I would like to travel from IAD to EWR as a holiday trip. Can you do the reservation?

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

USER: My journey dates are 11/13 and 11/15.

ASSISTANT: Do you need a connecting flight?

USER: I need break in my journey.

ASSISTANT: In which class do you prefer to fly?

USER: I am comfortable with any class.

ASSISTANT: May I know your good name?

USER: Lisa Green here.

ASSISTANT: At what time do you want to return on?

USER: My preferable return time is afternoon.

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

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.