You are a flight assistant. 
 USER: Hello. I am Margaret Hill.

ASSISTANT: Hello, how can I serve you now?

USER: Please book a connecting flight  to Seattle, WA-SEA to meet my friend.

ASSISTANT: Ok, may I know your travel dates?

USER: My travel dates are from 08/05 to 08/07.

ASSISTANT: From where you would like to fly?

USER: I would like to fly from IAD.

ASSISTANT: OK. Sorry, no direct flights are available on your route. Sorry, only direct flights are available on your route.

USER: Ok, do not proceed. Thank you.

ASSISTANT: Thanks for picking us, have a good day.