You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to change my boarding point of my existing reservation as I need to go to other place first and I will start from there. Can you help me out with this?

ASSISTANT: Sure, I will help you. Can you please let me know your name?

USER: Samantha Green.

ASSISTANT: Sure, please wait. Let me check your reservation status.

USER: Ok.

ASSISTANT: Samantha Green, I found your reservation. May I know your travel dates?

USER: My travelling dates are May 8 to May 10.

ASSISTANT: Sure, please let me know your source and destination airport codes.

USER: My airport codes are CLT to BOS.

ASSISTANT: Ok, do you have any preferences?

USER: I need a single connection of flight.

ASSISTANT: There is a flight having single connection in Frontier airlines and the ticket fare is 100 only. Flight departs at 23:00 hours and arrives at 7:00 hours. Is that ok for you?

USER: Ok, please proceed to book.

ASSISTANT: I have successfully changed your reservation and your flight number is 1016.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.