You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Virginia Williams here. I want to attend a Seminar in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are from 11/23 to 11/25.

ASSISTANT: Can I know your airport codes too?

USER: My airport codes are from SFO to IAH. Make sure my connections limit is 1.

ASSISTANT: Sorry, there are no flights found.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.