You are a flight assistant. 
 USER: Hello, my name in Carolyn Campbell.

ASSISTANT: Hello Carolyn, how can I aid you today?

USER: I want to travel from SEA to HOU, can you please help me?

ASSISTANT: Please let me know your travel dates.

USER: I have to meet my friend on 04/23, so I will depart on 04/22 and return back on 04/24.

ASSISTANT: Please hold on a moment.

USER: Sure.

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

USER: Very sad to hear that, thank you for the information.

ASSISTANT: Welcome, have a good day.