You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from IAD to PHX, please help me with it.

ASSISTANT: Sure, please provide your journey dates.

USER: My travelling dates are from 10/11 to 10/13.

ASSISTANT: Ok, May I know your name?

USER: I am Michelle Hill.

ASSISTANT: Ok, please provide your price limit.

USER: I can pay up to 5000.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thank you for your time, No flights were found with your given dates.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.