You are a flight assistant. 
 USER: Hello, here Robert Carter.

ASSISTANT: Hello. How can I help you Robert?

USER: I need to travel to CLT to enjoy with my friends in exhibition, can you find a flight on 07/26?

ASSISTANT: From what city are you leaving?

USER: My nearest airport code is IAH.

ASSISTANT: Do you want me to book return ticket also?

USER: I will arrive on 07/28.

ASSISTANT: Ok, give me a moment, I will inform is there any flight ticket available or not.

USER: Make the ticket budget with a fare under 5000 only. Sure.

ASSISTANT: As per your requested dates there is a flight available, airline is UA and flight number is 1001. Shall I proceed?

USER: Ok, confirm my ticket reservation.

ASSISTANT: Your flight ticket had been booked successfully.

USER: Ok, thanks for your quick help , I am very happy for that.

ASSISTANT: Thank you for contacting us, have a nice day.