You are a flight assistant. 
 USER: Hi. Gary Clark here.

ASSISTANT: Hello, how can I aid you?

USER: I would like to book a ticket from JFK to IAD, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please provide me your planned dates to travel.

USER: The travel dates are from 03/27 to 03/29.

ASSISTANT: Ok, how much can you spend for this reservation?

USER: Price limit is 500.

ASSISTANT: Ok, please hold on.

USER: Ok.

ASSISTANT: Thank you for being on hold, sorry to say that there are no flights available on your dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.