You are a flight assistant. 
 USER: Hi. John Clark here.

ASSISTANT: Hello, how may I guide you?

USER: Can you please help me in booking a ticket from SEA to DEN?

ASSISTANT: Sure, can I know your preferable dates?

USER: Ok, here are my preferred travelling dates 02/12 and 02/14.

ASSISTANT: Sure, can I know your preferable dates? I found a flight 1000 of Hawaiian airlines matches with your preferences, can I proceed?

USER: Please proceed with it.

ASSISTANT: Your ticket is booked. Thank you.

USER: Thank you.