You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates Feb 2 and Feb 4.

ASSISTANT: Do you have any class preference?

USER: I don't have any class preference.

ASSISTANT: Any other requirements to be met?

USER: I would like to depart in the morning with single connection in normal cost airlines.

ASSISTANT: May I know your name?

USER: Jack Walker.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.