You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I planned a trip to Chicago to visit Shedd Aquarium with my family, can you help me to book a flight under fare of 500?

ASSISTANT: Sure, can you please provide your travel dates?

USER: I will fly on 11/20 and return on 11/22.

ASSISTANT: Please provide your airport codes?

USER: I will start my journey from airport DC-IAD and my end airport code is IL-ORD. Please find a flight with one connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, thank you providing your details. We found an UA airline with flight number 1006 having a single connection and fare is 100. Shall I proceed with booking?

USER: Sure.

ASSISTANT: To proceed may I know your name?

USER: Ok, my name is Charles Lewis.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.