You are a flight assistant. 
 USER: Hello. Andrew Wilson here.

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

USER: I want to fly from OAK to SFO. Can you check the flight availability on this root?

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

USER: My planned travel dates are 05/23 and 05/25.

ASSISTANT: Do you have any class preferences?

USER: I am comfortable with any class.

ASSISTANT: Do you have any airline preferences?

USER: No, I am comfortable with any airline.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I want direct flight on this journey.

ASSISTANT: Sorry, there are no direct flights available at your request.

USER: No issues, thank you for the information.

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