You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book me a flight ticket from EWR to DFW to meet my family?

ASSISTANT: May I know your journey dates?

USER: I have planned to travel on July 16th and return on July 18th.

ASSISTANT: Is there any connection limit?

USER: I like connecting flight.

ASSISTANT: May I know your good name?

USER: Donald Green.

ASSISTANT: Any more requirements you have?

USER: No, thanks.

ASSISTANT: There were no flights running currently with your specified dates to travel.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.