You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: My sister blessed with a baby, so I need to go from SEA to DCA. Can you help me to find a flight?

ASSISTANT: That's great to hear. I will help you with that. Please provide me your travel dates too.

USER: My travel dates are 12/19 and 12/21.

ASSISTANT: Thank you for providing information, please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. May I know your good name please for verification?

USER: I am Robert Johnson.

ASSISTANT: Sorry Robert, there is no flight free on your dates.

USER: It's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your help.

ASSISTANT: You are welcome, have a good day.