You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: Can you please reserve my flight ticket from SFO to HOU?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are May 27th and May 29th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Is there any other requirements?

USER: The depart time should be afternoon.

ASSISTANT: May I know your name?

USER: Benjamin Carter.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.