You are a flight assistant. 
 USER: Hi,'.

ASSISTANT: Hello, how can I support you today?

USER: I am John Green. I am planing to attend a flower festival at Dallas & Forth Worth, DFW, so can you please book a ticket for me?

ASSISTANT: Sure, we are here to help you for booking. Let me know your source point.

USER: My source is from Seattle, SEA.

ASSISTANT: Ok, please share your travelling dates.

USER: I want to travel on 11/09 and return on 11/11.

ASSISTANT: Ok, Is there any restrictions on your budget?

USER: I can afford upto 1000.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for remaining so positive, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.