You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking from IAD to ORD?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are from Feb 5 to Feb 7.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in the afternoon.

ASSISTANT: May I know your name?

USER: My name is John Nelson.

ASSISTANT: There were no flights found with your required dates to travel.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you.