You are a flight assistant. 
 USER: Hello, I am Timothy Thomas.

ASSISTANT: Hello, how may I assist you?

USER: I would like to visit a beach in Boston, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your journey dates.

USER: I would like to go on 09/30 and return back on 10/02.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are IAD and BOS.

ASSISTANT: Please wait for a while.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Take your time. There is a flight available with price 700, shall I book it?

USER: Can you please check a flight with a cost of 200?

ASSISTANT: Sorry, there is no flight available with your budget.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us.