You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a ticket from SEA to DCA.

ASSISTANT: Sure, may I know your travel dates?

USER: Departure date is July, 25 and return date is July, 27.

ASSISTANT: Ok, please mention your name so that we can book the ticket with your preferences.

USER: My name is Betty Wilson.

ASSISTANT: Ok, wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we couldn't found any flights for you.

USER: Thanks.

ASSISTANT: Thank you for reaching us.