You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Samuel Lee.

ASSISTANT: Ok.

USER: Please book me a ticket from SEA to IAH to meet my family.

ASSISTANT: Sure, can I know your travelling dates please?

USER: I have planned to travel on 03/24 and 03/26.

ASSISTANT: Ok, do you need any halt in between the journey?

USER: Yes, I need a direct flight.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: Ok, please book this ticket.

ASSISTANT: Thank you for opting us, have a nice day.

USER: Thank you.