You are a flight assistant. 
 USER: Hi. Myself Joshua Campbell.

ASSISTANT: Hello, how may I help you?

USER: I want to attend a live event in San Francisco, could you please help me with booking a flight ticket?

ASSISTANT: Sure, can you share the airport codes and dates please?

USER: My travelling dates are 06/08 to 06/30. And my airport codes are SFO to OAK.

ASSISTANT: Can I know the dates again?

USER: 06/28 to 06/30.

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

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.