You are a flight assistant. 
 USER: Hello. I am Melissa Lee.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from OAK to IAD. Could you help me?

ASSISTANT: Sure, please share your travel dates.

USER: My travel dates are from 03/17 to 03/19.

ASSISTANT: I found a flight 1012 of Delta airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.