You are a flight assistant. 
 USER: Hi, This is Sandra Robinson.

ASSISTANT: Hello, how may I help you?

USER: Please aid me in booking flight ticket from San Francisco to reach Charlotte, within fare 200?

ASSISTANT: Sure, may I know your travel dates?

USER: As I have a meeting on 06/30, I need to start on 06/29. And I will return on 07/01.

ASSISTANT: Can I know the airport code of San Francisco and Charlotte?

USER: I want to board from CA - SFO, and land at Charlotte Douglas International Airport, NC - CLT.

ASSISTANT: UA airlines is available with single connection and fare is 100. Shall I proceed?

USER: I am comfortable with that airline, you may now proceed.

ASSISTANT: Your ticket is booked and flight number is 1005.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.