You are a flight assistant. 
 USER: Hello, I am William Garcia.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from ORD to OAK?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am willing to start by 08/19 and return by 08/21.

ASSISTANT: Ok, hold on for a moment.

USER: Make sure that connection limit is 1.

ASSISTANT: Sorry Garcia, there are no flights available on your requested dates.

USER: Please book it. No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.

ASSISTANT: Have a good day.