You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Frank Martinez. Can you help me in booking from OAK to SFO, as there is a conference meeting to attend?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My trip dates are May 5 to May 7.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Sorry to say, no flight is available for you.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.