You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Alexander Nelson here.

ASSISTANT: How may I help you?

USER: I have planned a hangout trip in Houston, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I will help you in booking.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I want to take off on 08/19 and please book my return ticket on 08/21.

ASSISTANT: Can I know your airport codes please?

USER: My source and destination airport codes are LAX and IAH respectively.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: That's perfect, you can proceed with booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your assistance, have a nice day.

ASSISTANT: Thank you for approaching our services.

USER: Welcome.