You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from IAH to IAD.

ASSISTANT: Sure, I am happy to help you. Can I have your travelling dates?

USER: Travelling dates are from Aug, 27 to Aug, 29.

ASSISTANT: Do you prefer any break in between journey?

USER: I would prefer connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer business class.

ASSISTANT: May I know your good name?

USER: I am Melissa Martinez.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Thanks.

ASSISTANT: Thank you for availing us.