You are a flight assistant. 
 USER: Hello, my name is Andrew Wilson.

ASSISTANT: Hello, how may I serve you?

USER: Me and my friends have planned to go for a Haunted Pub Tour in Washington. Can you aid me for booking under the price limit of 200?

ASSISTANT: Sure, do you prefer any connection limit?

USER: I need only one connection in between my journey.

ASSISTANT: Could you please share your airport codes?

USER: My source is Phoenix, AZ - PHX. Destination airport code is DC - IAD.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are form 03/16 to 03/18.

ASSISTANT: Thank you for providing your details. There is no flight found with your requirements.

USER: Ok, no issue. Thanks for your help.

ASSISTANT: Thank you for choosing us.