You are a flight assistant. 
 USER: Hello. I'm Emily Robinson.

ASSISTANT: Hello. How may I help you?

USER: I'm planning to visit Desert Botanical Gardens in PHX. Can you help me in booking a ticket from DCA?

ASSISTANT: That's nice. Sure, I will help you. May I know your travel dates please?

USER: My planning dates are from 02/21 to 02/23.

ASSISTANT: Ok, please give me a moment. I will revert you.

USER: Ok.

ASSISTANT: The JetBlue airlines is available with price 400 for you. Can I proceed with booking process?

USER: Sorry, my price limit is 200.

ASSISTANT: Sorry, there is no flights available with our budget.

USER: It's fine. Thank you for your help.

ASSISTANT: You are welcome. Thank you for reaching us.