You are a flight assistant. 
 USER: Hello, I am Andrew Johnson.

ASSISTANT: Hello Andrew Johnson. How may I help you today?

USER: I am planning to visit White House at Washington, can you please book a ticket from Seattle?

ASSISTANT: Sure, please provide your travelling dates?

USER: Journey starts from 05/28 to 05/30.

ASSISTANT: Could you please provide your airport codes?

USER: Airport codes are SEA to IAD.

ASSISTANT: Do you need any connection limit?

USER: I need direct flight.

ASSISTANT: Thank you for your details, we found a connecting flight. Shall I proceed?

USER: Don't proceed. Thank you.

ASSISTANT: Ok, thank you for approaching us.