You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Samantha Allen.

ASSISTANT: Ok.

USER: I wish to visit Cockerel Butterfly center at Houston HOU as it is the best place for visiting. Can you assist me in booking a flight ticket on 02/25?

ASSISTANT: Sure, may I know your boarding point?

USER: My boarding point is Oakland, OAK.

ASSISTANT: Ok, on which date you want to return to Oakland?

USER: I intend to return on 02/27.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights found with your given dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.