You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Robinson.

ASSISTANT: How can I serve you?

USER: Can you please assist me in booking a flight ticket from ORD to IAD to attend a film festival?

ASSISTANT: Sure, I am happy to help you. May I know your travelling dates?

USER: My planned journey dates are June 13 and June 15.

ASSISTANT: Do you have any lay by in between journey?

USER: I need a lay by in between my journey.

ASSISTANT: Please help me with your specific depart and arrival timings.

USER: My return time should be morning.

ASSISTANT: Is there any class preference for you?

USER: Yes, I prefer business class for my journey.

ASSISTANT: Can you please let me know your airline specification?

USER: I am comfortable with any airline.

ASSISTANT: Thanks for providing details, we are unable to provide flights on your preferable dates of journey.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.