You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to attend Pioneer festivals at Washington, DC - IAD. Can you please hold me a flight ticket from Boston, MA - BOS?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: My trip dates are from 09/13 to 09/15.

ASSISTANT: Ok, how much do you want to spend on your ticket?

USER: I can afford up to 500 only.

ASSISTANT: Ok, May I know your name?

USER: I am Gregory Johnson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Thank you for your patience, we did not find any flights with your given details.

USER: Not a problem , I will check out with the another airlines. Thank you for your information.

ASSISTANT: Ok, Thank you for availing us.