You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am planning to attend business meeting at PHX, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure, can you please let me know your preferred dates of travel?

USER: I would like to take off on May 17 and return on May 19.

ASSISTANT: Do you have any specifications?

USER: I would like to return during evening time.

ASSISTANT: May I know your name for documentation purpose?

USER: My name is George Moore.

ASSISTANT: Ok, please wait a minute.

USER: Ok, but I am also looking for a connecting flight.

ASSISTANT: Sorry to say that there were no flights found on your preferred dates of travel.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.