You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Johnson here.

ASSISTANT: How may I help you?

USER: I want to attend a Marriage in Charlotte. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can I know your source and destination airport codes?

USER: My airport codes are from SFO to CLT.

ASSISTANT: Ok, let me know your preferable dates.

USER: My travelling dates are from 01/25 to 01/27.

ASSISTANT: I found a flight from Spirit airlines with 1 connection and flight number is 1023. Shall I proceed?

USER: Make sure my price limit is 500.

ASSISTANT: Your ticket is booked and fare is 200.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.