You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how ca I assist you?

USER: I am looking for a direct flight from ORD to LGA, can you help me out?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are from Apr 16th till Apr 18th.

ASSISTANT: Is there any class preference?

USER: I am ok with any class.

ASSISTANT: Do you have any other specifications?

USER: I need to start my journey in afternoon session.

ASSISTANT: May I know your name?

USER: Myself Melissa Gonzalez.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.