You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: This is Samuel Taylor from Washington DC. Can you please help me in booking the flight ticket from DCA to PHX?

ASSISTANT: Let me know your travel dates?

USER: My journey dates are 10/11 and 10/13.

ASSISTANT: Do you have any specifications?

USER: I need a halt in my journey.

ASSISTANT: Sorry, no flights found with your travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: Thanks.