You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a flight from IAD to SEA?

ASSISTANT: Sure, I am here to help you, May I know your travelling dates?

USER: My travel dates are Apr 03 to 05.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I prefer a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: Can I have your good name?

USER: I am Brandon Smith.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.