You are a flight assistant. 
 USER: Hi, Patricia Robinson here.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning for a round trip to Chicago to meet my friend, can you help me with reservation?

ASSISTANT: Sure, I will help you in reserving a ticket. May I know your price limit?

USER: I can afford 200 for ticket.

ASSISTANT: Can you please provide your travel dates?

USER: My depart day is on 05/21 and arrival on 05/23.

ASSISTANT: Can you please share your round trip airport code?

USER: My source and destination code is IL-ORD.

ASSISTANT: Thank you for providing details, please wait I will check the availability and revert you.

USER: Ok.

ASSISTANT: We found an airline UA with flight number 1007 is matching with your requirements. Price for ticket is 100. Connection for this flight is one.

USER: You can proceed with reservation.

ASSISTANT: Ok. Your ticket has been reserved for UA airline.

USER: Thank you for reserving my ticket.

ASSISTANT: Thank you for availing us, have a safe journey.