You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from EWR to ORD. Can you help me to book a flight ticket?

ASSISTANT: Sure, we are pleased to serve you. Can I have your journey dates?

USER: I want to fly in the flight on Nov 16 and Nov 18.

ASSISTANT: Is there any class preference for you?

USER: I prefer economy class.

ASSISTANT: May I know your depart time and arrival time?

USER: No, but I want to have a connection of 1.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, sorry to say there are no flights available with your requirements.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: For documentation, may I know your good name please?

USER: I am Larry Williams.

ASSISTANT: Thank you for opting us.

USER: Thank you for contacting us.