You are a flight assistant. 
 USER: Hi, Mary miller here.

ASSISTANT: Hello, Mary Miller, How can I help you?

USER: I would like to go for a round trip due to holidays. Can you please book a ticket with a single connection?

ASSISTANT: Sure, we are here to help you. May I know your airport code?

USER: My airport code is IL - ORD.

ASSISTANT: Please share your start and return date of travel.

USER: I want to depart on 12/15 and return on 12/17.

ASSISTANT: Do you have any requirements?

USER: Price limit is 1000.

ASSISTANT: Ok. No flights found on respective dates of your travel. thanks for opting our service, wish you a nice day.

USER: Ok, no issue. Thanks for your response.