You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I planned to meet my friend in DEN, can you please help me to book a flight ticket from EWR?

ASSISTANT: Sure, may I know your planned trip dates?

USER: I prefer to travel on Oct 29 and Oct 31.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Is there any class preference?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your arrival and depart timings?

USER: I am comfortable with any time.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: I am Betty Roberts.

ASSISTANT: Please be on hold. Sorry, there are no flights found on your travel dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.