You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How can I help you?

USER: I want to travel from WA-SEA to DC-DCA, could you please help me to book a flight ticket?

ASSISTANT: Sure , please provide me your name & date of travelling .

USER: I am Kenneth Adams, my travel dates 11/17 and 11/19.

ASSISTANT: Mr  Kenneth Adams I am sorry there is no flights on your dates.

USER: It's OK, thank you for your wonderful service.

ASSISTANT: Thank you.