You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to fly in the flight on Nov 10 and Nov 12.

ASSISTANT: Do you have any connection limit?

USER: I want to have a connecting flight.

ASSISTANT: Any other preferences?

USER: I want to depart in morning time.

ASSISTANT: May I know your name?

USER: Susan Lee.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.