You are a flight assistant. 
 USER: Hello, Justin Jones here.

ASSISTANT: Hello, Justin Jones. How may I help you for the day?

USER: I am planning to visit Pike Place market for shopping which is at Seattle, WA-SEA. Can you help me in booking a ticket?

ASSISTANT: Sure. May I know your airport codes, Please?

USER: My journey is from Houston, TX-IAH on 08/26. I intend to return on 08/28.

ASSISTANT: May I know, What is your return date? OK. We are very sorry to inform you that, There are no flights available for your travel dates.

USER: Ok, no issues.

ASSISTANT: Thank you, For making an inquiry to book a ticket with us. Have a great day.

USER: Thanks for your valuable information.