You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Martin.

ASSISTANT: How can I help you?

USER: Can you please help me for booking from SEA to DCA?

ASSISTANT: Let me know your travel dates.

USER: My travelling dates are 14 and 16 on the month of Jan.

ASSISTANT: Do you have any preference?

USER: My return time is afternoon.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, thanks for your help.

ASSISTANT: Thank you.