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

ASSISTANT: Hello, how may I help you?

USER: I want to Washington DC - DCA from Phoenix, AZ - PHX for a medical treatment. Can you book me a ticket on dates from 03/03 to 03/05?

ASSISTANT: Sure, please wait a while.

USER: Ok. Please make sure that price limit is 1000 and connection limit is 0.

ASSISTANT: Thank you for being waiting. There is no flight found with your requirements.

USER: Ok, no issues. Thanks for your response.

ASSISTANT: Thank you for reaching us.