You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Hernandez.

ASSISTANT: Karen, how can I guide you today?

USER: I have to attend an event at Houston, can you please book the flight ticket from SEA to IAH?

ASSISTANT: May I know your planned dates of trip please?

USER: I want to depart on 10/29 and return back on 10/31.

ASSISTANT: Ok, wait for a while.

USER: Sure.

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

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.