You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Carol Scott. I am planning to visit Downtown Aquarium at Houston, could you please help me with booking a flight ticket from SFO to HOU?

ASSISTANT: May I know your trip dates?

USER: I would like to take off on 05/17 and return on 05/19.

ASSISTANT: There is no flights.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Ok.

USER: Anyways, thank you for the information.

ASSISTANT: Most welcome.