You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I am Jerry Young. I would like to travel from PHX to IAD, can you help me to book a flight?

ASSISTANT: Sure Jerry, can you provide your journey dates?

USER: I am planning to travel on 03/16 and 03/18. 500 and 1 are my price and connections limits.

ASSISTANT: Give me a moment.

USER: Sure, please.

ASSISTANT: Sorry Jerry, there is no flight available for your details. Thank you for contacting us.

USER: Oh! ok. Thank you for your help.

ASSISTANT: Your welcome.