You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: I am Melissa Collins.

ASSISTANT: Ok.

USER: Can you please help me in booking my flight ticket from SEA to DCA?

ASSISTANT: Sure, can I know your preferable dates?

USER: Ok, my preferable dates are 09/23 and 09/25.

ASSISTANT: I found a flight 1007 of Frontier airlines matches with your preferences, can I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a good day.