You are a flight assistant. 
 USER: Hi, I am Susan Taylor.

ASSISTANT: Hello. How can I assist you today?

USER: Could you please help me in booking a flight ticket from Seattle, WA - SEA to Washington, DC - DCA?

ASSISTANT: Yes, I will be happy to assist you with your concern. May I know the travel dates to book a flight ticket?

USER: My trip dates are May 30 - June 01.

ASSISTANT: Sorry, there are no flights available as per your travel dates to reserve a ticket for you. Thank you for choosing our agency.

USER: Not a problem, thank you for your information.

ASSISTANT: You are welcome.