You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I benefit you?

USER: I am George Roberts. My friends planned a trip to Camel-back Mountain in Phoenix for hiking, so I want to book a ticket from Washington.

ASSISTANT: Ok, Can you please share the departure and arrival airport codes?

USER: My departing from Washington IAD airport and land in Phoenix PHX airport.

ASSISTANT: Alright Roberts, may I know your travelling dates to proceed further?

USER: I am departing on 11/23 and return on 11/25.

ASSISTANT: Ok, please give me a moment to check the best flight.

USER: Ok, make sure the connection limit is 1.

ASSISTANT: Sorry Roberts, there is no flight available on your requested dates.

USER: That's ok, I will check for other alternative.

ASSISTANT: Thank you for reaching to us Roberts.

USER: Thank you for your information.