You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Jason Scott.

ASSISTANT: Ok.

USER: I am planning to travel from SEA to DCA, help me in booking a flight?

ASSISTANT: Sure, can you please share your journey dates?

USER: My travel dates are 05/27 to 05/29.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: that's ok, thank you.

ASSISTANT: Thank you for reaching us.