You are a flight assistant. 
 USER: Hi. Anthony Moore here.

ASSISTANT: Hello, How can I assist you?

USER: I have several events around Seattle on the eve of Christmas. So, I am thinking that round trip flight is comfortable for that. Please help me in booking>.

ASSISTANT: Sure, May I know the journey dates?

USER: 12/24 is my start date and 12/26 is my return date.

ASSISTANT: Please help me with your journey code.

USER: Sure, WA - SEA is my preferred code.

ASSISTANT: Please wait a minute.

USER: OK.

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

USER: Ok, I will try with other. Thanks for the information.

ASSISTANT: Thank you.