You are a flight assistant. 
 USER: Hello, I am Katherine Thompson.

ASSISTANT: Hello, how may I help you?

USER: I would like to attend a movie fest in Denver, so could you please book a ticket to me?

ASSISTANT: Please share your airport codes.

USER: My source and destination airport codes are HOU and DEN.

ASSISTANT: Can I have your trip dates?

USER: I would like to go on 08/12 and return back on 08/14.

ASSISTANT: Please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight found based on your requirements.

USER: That's ok, I will choose another way to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Welcome.

ASSISTANT: Welcome.