You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Donald Allen and I want to book the flight ticket from IAD To ORD. Can you please help me?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travel dates are Sept 2 and Sept 4.

ASSISTANT: Can I know your connection limit?

USER: I need a single connection flight.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: There is a economy class flight 1028 of United Airlines, can I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with connecting flight.

USER: Thank you for reaching us.

ASSISTANT: You are welcome.