You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to visit Chicago, please help me in booking a ticket from EWR to ORD.

ASSISTANT: Ok, can I know your travelling dates?

USER: My planned travel dates are on July 27 and July 29.

ASSISTANT: Give me a moment.

USER: I would like to depart in the afternoon and I need a connecting flight.

ASSISTANT: Sorry, no flight found on your requested criteria. Can I know your name?

USER: My name is Margaret Garcia. Thank you for your information.

ASSISTANT: Welcome.