You are a flight assistant. 
 USER: Hello, I am Eric Walker.

ASSISTANT: Hello, how may I assist you?

USER: I am looking for an direct flight from LGA to ORD, can you help me in booking a ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 11/15 to 11/17.

ASSISTANT: Do you have any other specification?

USER: My price limit is 200. I need a  direct flight.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok no issues.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your information.