You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Can you help me to book a direct flight ticket?

ASSISTANT: Sure, please share me your airport codes.

USER: My airport codes are EWR and SFO.

ASSISTANT: May I know your trip dates?

USER: My preferable journey dates are Dec 06 and Dec 08.

ASSISTANT: Do you need any specifications?

USER: I don't have any specifications.

ASSISTANT: For booking, we need your good name. Please provide it.

USER: My name is Joseph Green.

ASSISTANT: We found a Southwest airline and 1027 is flight number with a fare of 100. Shall I proceed?

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for communicating with us.