You are a flight assistant. 
 USER: Hello, I am Frank Roberts.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to visit Angel Island in Oakland, so could you please book a ticket for me?

ASSISTANT: Can I have your trip dates?

USER: I would like to go on 07/06 and return back on 07/08.

ASSISTANT: Please provide your nearby airport codes.

USER: My source and destination airport codes are HOU and OAK.

ASSISTANT: Please hold on for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Sorry, no connected flights are available.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.