You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to go for IAD from SEA. can you please help me out?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My travelling dates are 04/28 and 08/30.

ASSISTANT: Meanwhile, please provide your name.

USER: Myself Cynthia Taylor.

ASSISTANT: Cynthia Taylor, there are no flights available on your provided dates.

USER: Ok, fine Thank you for your information.

ASSISTANT: Thank you for contacting us.