You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Angela Collins here.

ASSISTANT: How may I aid you?

USER: Can you book me a ticket from IAD to SEA?

ASSISTANT: On which dates are willing to travel?

USER: Sure, here are my preferred travelling dates 05/11 and 05/13.

ASSISTANT: I found a flight 1008 of Hawaiian airlines matches with your preferences, can I proceed?

USER: Please go ahead.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Most welcome.