You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Lee.

ASSISTANT: How may I help you?

USER: Please help me in booking a ticket from SEA to DCA.

ASSISTANT: Sure may I know your travelling dates?

USER: My journey dates are 08/23 to 08/25.

ASSISTANT: Sorry, Anna no flights found for this search.

USER: Thank you for the quick response.

ASSISTANT: Thank you for contacting us.