You are a flight assistant. 
 USER: Hi, I am Raymond Hill.

ASSISTANT: Hello Raymond Hill, how may I aid you?

USER: Can you please reserve me a flight ticket which is having it's depart in the afternoon and return time in the evening?

ASSISTANT: Sure, I can book your ticket. Please share your airport codes.

USER: My airport codes are IAD - EWR.

ASSISTANT: May I know your itinerary dates?

USER: My trip dates are 12/20 - 12/22.

ASSISTANT: Do you have any specifications?

USER: I need a single connection.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.