You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: This is Thomas Moore.

ASSISTANT: is there any help seeking from my side Moore?

USER: Please reserve a flight ticket from SEA - DTW as I am planning to visit Dallas for a baseball match. These are my preferable travel dates 07/26 and 07/28.

ASSISTANT: Yes Moore, I can reserve your plane ticket. Please wait for some time I will check it and revert you back.

USER: Sure.

ASSISTANT: Thank you for your patience.

USER: Please keep the cost under 500.

ASSISTANT: Sorry Moore, there is no flights found to reserve your ticket because all the seats were blocked. Thank you for your valuable time in contacting us.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Have a great day Moore.