You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Here Barbara Carter. I want to book a ticket from Seattle to Charlotte for attending an office seminar.Can you help me for the flight ticket booking?

ASSISTANT: Sure, please share your trip dates.

USER: My trip dates are from April 21st to April 23rd.

ASSISTANT: May I know your source and destination airport codes?

USER: Sure, my origin code is SEA and destination code is CLT.

ASSISTANT: Do you need any specfications?

USER: Yes, make sure that my price limit with in 1000.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your own time.

ASSISTANT: We found a UA airline and 1007 is flight number with a fare of 100. Shall I proceed?

USER: Yes, u can proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your quick response.

ASSISTANT: Thank you for reaching us.