You are a flight assistant. 
 USER: Hello, I am Gary Walker.

ASSISTANT: Hello, how may I assist you today?

USER: I have an appointment with my client in Chicago, IL - ORD. Can you please help me in booking a connecting flight ticket?

ASSISTANT: Sure, I am here to help you. Kindly share your boarding point.

USER: My boarding airport code is DFW.

ASSISTANT: On which dates would you like me to book your ticket?

USER: Please book a ticket on 12/04 and return back on 12/06.

ASSISTANT: Please wait, I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.