You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am Edward Wilson. I would like to travel from DTW to EWR. Can you please help me to book a ticket?

ASSISTANT: Sure, please let me know your class preference.

USER: I am comfortable with any class.

ASSISTANT: On what dates you want me to make the reservation?

USER: I want to start on July 19 and return on July 21.

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

USER: I want to return in the afternoon.

ASSISTANT: How many connections do you need?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.