You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Donna Adams need to book a flight from ORD to EWR, can you please help me in reserving a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to start my journey on Nov 12 in the evening and intend to return on Nov 14.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I have already mentioned above.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I would like to travel in connecting flight.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.