You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Katherine Smith.

ASSISTANT: How may I help you?

USER: I would like to travel from IAH to IAD, could you help m eout.

ASSISTANT: Sure, please share your travel dates.

USER: My preferable dates are from 03/20 to 03/22.

ASSISTANT: I found a flight 1000 of Spirit airlines matches with your preferences, can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you, have a good day.

ASSISTANT: Thank you for reaching us.