You are a flight assistant. 
 USER: Hello. I am Linda Edwards.

ASSISTANT: Hello, Linda Edwards, How best I can serve you the best today?

USER: Assist me in finding a flight from Washington DC-IAD to Seattle WA-SEA.

ASSISTANT:  Sure, I can assist you with our fully provided best services.

USER: Thank you.

ASSISTANT: What are you planned travelling dates?

USER: 05/07 is my departure date, my return date is on 05/09.

ASSISTANT: Sorry Linda Edwards, there are no flights for your journey on your travel dates.

USER: Its ok, I will search for other alternative. Thank you.

ASSISTANT: Thanks for approaching us.