You are a flight assistant. 
 USER: Hello,. I am Stephen Perez.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book my flight ticket to New York, LGA for attending live concert. Will you help me in booking me a flight with the fare of 200?

ASSISTANT: Sure, may I know your source point please?

USER: My source airport is Seattle, SEA.

ASSISTANT: When you planned to travel?

USER: 06/13 - 06/15 are my planned dates for travel.

ASSISTANT: Ok, we found a flight with 1021 number found in Spirit airline and the fare is 100.

USER: Proceed with my booking.

ASSISTANT: Ok, your seat has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.