You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, which service are you looking for today?

USER: My plan to visit New York to make a documentary about street children's, can you help me to book a flight ticket from Houston?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Can you please provide me your location points?

USER: I will fly from SEA to IAH.

ASSISTANT: Ok, what are your journey dates?

USER: My depart date is 09/27 and arrival date is  09/29.

ASSISTANT: May I know your name please?

USER: I am Paul Evans.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight available on your dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.