You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Hill here, I want to reserve my ticket from CLT to OAK, can you please help me?

ASSISTANT: Sure, please provide your journey dates. Please hold on for a while.

USER: Ok, my dates of journey are from 01/19 to 01/21.

ASSISTANT: Let me check.

USER: Ok. But, I need a direct flight.

ASSISTANT: Sorry Hill, no flight is available on your route.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.