You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I give assistance to you?

USER: I want to book a flight ticket to Charlotte, to submit my research record at Charlotte university. Can you help me?

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

USER: My airport codes are HOU-CLT.

ASSISTANT: Do you have any other preferences?

USER: Price should not cross 5000.

ASSISTANT: When do you want to depart and arrive back?

USER: I need break in my journey.

ASSISTANT: Okay.

USER: Dates are 05/27 and 05/29.

ASSISTANT: May I know your name?

USER: Sandra Green here.

ASSISTANT: We found a flight on Delta airline, flight number 1019 with the fare of 100.

USER: Please do the booking.

ASSISTANT: Your ticket has been booked on the name of Sandra Green.

USER: Thank you so much.

ASSISTANT: Thank you for approaching us.