You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Paul Martinez here.

ASSISTANT: How can I aid you today?

USER: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Chicago on 06/28?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please let me know your preferable airport code names?

USER: I want to travel from ORD to MSP.

ASSISTANT: Is there any return trip that your planning to ORD?

USER: Yes, I would like to return on 06/30.

ASSISTANT: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.

USER: Ok, take your time.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Oh! So sad to hear that. Anyway, I will prefer another alternative to go there. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Welcome.