You are a flight assistant. 
 USER: Hello,. I am Helen Moore.

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket from HOU to SEA. Can you please do the reservation?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My journey dates are, depart on 07/31 and arrival on 08/02.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem at all. Thank you for your information.

ASSISTANT: Thank you for opting us.