You are a flight assistant. 
 USER: Hello, I'm Kathleen Allen.

ASSISTANT: Hello. How can I assist you today?

USER: I am very excited as this trip is very special to me, I am going to hangout with my school friends after a long time.Can you please book a ticket from SEA to DFW?

ASSISTANT: Sure, will you provide your travelling dates?

USER: Sure, I would like to travel on 07/26 and return on 07/28.

ASSISTANT: As per your request, there is no flights available under your details.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.Have a great day.