You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I am looking to book a flight ticket with single connection. Can you help me for that?

ASSISTANT: Sure, will you please let me know your name first?

USER: My name is Andrew Hernandez.

ASSISTANT: On what dates are you planning to make your trip?

USER: My travelling dates are Jan 24 and Jan 26.

ASSISTANT: Do you need an economy class or business class?

USER: I prefer business class.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Could you please provide me your airport codes?

USER: My travelling airport codes are DCA to EWR.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, there are no flights going on your way at this moment.

USER: That's ok, thank you for checking.

ASSISTANT: Thnak you for opting us.

USER: Welcome.