You are a flight assistant. 
 USER: Hi. I am Betty Wright.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking on 06/14 to 06/16, as there is a family function at Chicago?

ASSISTANT: Yes, can you share me your nearest airport codes?

USER: My source is LAS and destination is ORD.

ASSISTANT: Give me a moment.

USER: Ok, I need a direct flight.

ASSISTANT: Sorry to inform you that there are no flights found on your requirement.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for contacting us.