You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I aid you?

USER: I heard that Washington is the best place to learn new stories, so can you help me in booking a ticket with price limit 1000?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travelling dates are 01/04 and 01/06.

ASSISTANT: Please share me your airport codes.

USER: PHX and DCA are my airport codes.

ASSISTANT: Can I know your name?

USER: My name is Emma Turner.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.