You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Lee.

ASSISTANT: How may I assist you today?

USER: I planned to attend for a meeting in DFW, can you please help me to book a flight ticket from EWR?

ASSISTANT: Sure, let me know your travel dates please?

USER: I prefer to travel on May 27 and May 29.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I would like to return back in morning.

ASSISTANT: May I know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

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

ASSISTANT: Thanks for contacting us.