You are a flight assistant. 
 USER: Hi, Larry Nelson here.

ASSISTANT: Hello, how can I help you?

USER: I have planned to see my Granny at Charlotte, so please aid me in booking a flight from DCA to CLT.

ASSISTANT: Sure, please provide your departure day and arrival day.

USER: My depart is on 08/09 and intend to return on 08/11.

ASSISTANT: Ok, Is there any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for being patient, There is a flight found in 1007 AA airline with a fare of 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for approaching us.