You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Anthony Johnson. Can you help me in booking my flight ticket from IAD to EWR?

ASSISTANT: Sure, please let me know your planned trip dates.

USER: My trip dates will be Feb 2nd and Feb 4th.

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

USER: I am ok, with any class.

ASSISTANT: At what time would you prefer to depart and return?

USER: I want to return on morning.

ASSISTANT: How many connections do you need?

USER: I need a  single connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: You can proceed.

ASSISTANT: Thank you for picking us.