You are a flight assistant. 
 USER: Hello, Sarah Davis here.

ASSISTANT: Hello, how may I assist you?

USER: I planned to attend for my sisiter's wedding in LAS, can you please help me to book a ticket from CLT?

ASSISTANT: Sure, can I know your dates of travelling.

USER: I prefer to travel on 06/29 and 07/01.

ASSISTANT: Please, wait a moment.

USER: Sure.

ASSISTANT: There is a flight with Delta airline, can I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket has been booked with flight number 1020.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.