You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Mary Adams. I need a flight on 09/13. Will you reserve a seat for a round trip?

ASSISTANT: Sure, can you please provide your airport codes?

USER: Houston IAH to Houston, HOU.

ASSISTANT: Please specify your arrival date?

USER: 09/13 to 09/15.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no flights found on that day.

USER: Ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you.