You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 08/09 to 08/11.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a single connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: May I know your name?

USER: Myself Patricia Scott.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.