You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. By what way can I guide you at this moment?

USER: I want to book a flight ticket from WA - SEA to TX - HOU to shoot a movie in Houston.

ASSISTANT: Ok. What is your starting date of journey?

USER: I will start on 09/22, return on 09/24.

ASSISTANT: Help me with your specifications?

USER: I want a direct flight.

ASSISTANT: Let me know your name to book a ticket.

USER: Dorothy Hill.

ASSISTANT: Thanks for your name. Unfortunately, I did not find any flights with your data because of having a busy at your route. Thank you for opting us.

USER: No problem, thank you for your service.