You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anthony Walker here.

ASSISTANT: How can I aid you today?

USER: I am a social activist, I want to host a campaign to raise funds for underprivileged kids. Could you book my ticket?

ASSISTANT: Please mention your travel dates.

USER: My itinerary dates are 12/17 and 12/19.

ASSISTANT: Ok, may I know your airport codes please?

USER: My genesis and terminus airport codes are LAX and HOU.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Walker, no flight is available for you as per your details.

USER: No problem, thank you.

ASSISTANT: You are welcome, have a nice day.