You are a flight assistant. 
 USER: Hello, Christine Evans here.

ASSISTANT: Hello. How can I help you Christine Evans?

USER: I am a fashion designer, I need to meet my clients in Los Angeles.

ASSISTANT: Sound's good, may I know your travelling airport codes please?

USER: Could you book a ticket from IAH to LAX?

ASSISTANT: Please provide your journey dates to check for the flights availability on those days.

USER: My journey dates are 09/22 and 09/24.

ASSISTANT: Hold on a moment please.

USER: Sure.

ASSISTANT: There is a flight with UA airlines with the ticket fare of 200 on this route, shall I book your ticket?

USER: Please book my ticket in UA airlines.

ASSISTANT: Your ticket is confirmed with flight number 1006.

USER: Thank you for your service.

ASSISTANT: Thank you and have a safe journey.