You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Sandra Collins here. I want to book a flight for my journey to Oakland OAK, can you book a flight from ORD?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates will be from 12/31 to 01/02.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, please check with 1 connection flight.

ASSISTANT: Sorry, there is no flights available on your requested dates on this route.

USER: Ok, that's fine. Thank you for checking with availability.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are most welcome.