You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket from HOU to SFO?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travel dates are from Dec 16th to Dec 18th.

ASSISTANT: May I know your connection limit?

USER: I want a single connection in between my journey.

ASSISTANT: Do you have any other requirements?

USER: Yes, I want to return in the morning.

ASSISTANT: May I know your name please?

USER: I am Justin Gonzalez.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.