You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, please provide your itinerary dates.

USER: I want to travel on Apr 14 and return on Apr 16.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: May I know your name?

USER: My name is Jason Young.

ASSISTANT: Sorry Jason Young, no flights are available on your route.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.