You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Help me in booking a flight from IAH to SFO?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My travelling dates are Mar 24 to 26.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting  flight.

ASSISTANT: Any other requirements to be met?

USER: I want to return in afternoon flight.

ASSISTANT: May I know your good name?

USER: I am Carol Garcia.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.