You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Timothy Scott. I would like to go for a round trip to Chicago, IL - ORD. Can you please book a ticket in a direct flight?

ASSISTANT: Sure, can you please help me to share your travel dates?

USER: I want to depart on 11/28 and return on 11/30.

ASSISTANT: Do you have any price limit?

USER: Price should not exceed 5000.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that we did not found any direct flight with your matching details.

USER: Ok, no issue. Thanks for the information.

ASSISTANT: Thanks for your service. Thanks for choosing us.