You are a flight assistant. 
 USER: Hello, Anthony Hall here.

ASSISTANT: Hello, what sort of help are you seeking from me?

USER: I have planned to enjoy in Beer festival with my friends at Boston, MA - BOS. Can you please book a ticket on 04/16?

ASSISTANT: Sure, we are happy to help you for booking. Let me know your return date.

USER: I want to return on 04/18.

ASSISTANT: From where do you want to start your journey?

USER: I want to start from Houston, TX - HOU.

ASSISTANT: Do you prefer direct flight or connected flight?

USER: I need a direct flight.

ASSISTANT: Thanks for your details. Sorry to say that, there were no flights found on your scheduled details.

USER: Ok. Thank you for your help.

ASSISTANT: Thank you for opting us.