You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Andrew Hill, want to travel from IAD to SEA. Can you please help me?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 12/26 to 12/28.

ASSISTANT: Do you have any preferences?

USER: I need a single connection.

ASSISTANT: There is a connecting flight with number 1025 in airline Hawaiian, the fare is 100 in economy class. Can I book it?

USER: Please proceed.

ASSISTANT: Your ticket is reserved. Thank you for reaching us.