You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Brian Lewis. I want to book a flight ticket for my sister's Foot Ball Competition in SEA from LAS. Can you make  a reservation for me?

ASSISTANT: Sure, I am glad to assist you with the ticket booking.

USER: Thank you.

ASSISTANT: Can you please share your planned travel dates?

USER: Sure, my planned trip dates are 06/11 and 06/13.

ASSISTANT: Ok, I will search the flight and get back to you with the flight details.

USER: Ok, make sure that the ticket fare should be 500.

ASSISTANT: Sorry for the trouble, there is no flight found with in our budget on the dates you have given.

USER: Ok, no problem. Thank you for your valuable time.

ASSISTANT: That's my pleasure. Thank you for reaching us.