You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicholas Rodriguez here.

ASSISTANT: How can I assist you?

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 Feb 20?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please share your return date.

USER: I would like to return on Feb 22.

ASSISTANT: May I know your airport codes please?

USER: Sure, I will prefer ORD and ATL as my origin and destination airports respectively.

ASSISTANT: Do you have any other specifications on your trip?

USER: Yes, I would like to departure at afternoon time and I need a economy class flight.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

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

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