You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight from DCA to attend a meeting. Can you find me a flight to PHX?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: I will fly on May 04 and return on May 06.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Nicholas Smith.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.