You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket. Can you please help me with that?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Helen Roberts.

ASSISTANT: OK Roberts, could you please tell your source and destination codes?

USER: I'm planning to travel from Charlotte NC-CLT to San Francisco CA-SFO.

ASSISTANT: OK. May I know on which dates you need booking?

USER: My preferable dates for journey are 05/30 and 06/01.

ASSISTANT: OK, please wait for a while.

USER: OK.

ASSISTANT: Based on your codes and dates there is an airline Southwest having price as 100 and connections as 1.

USER: That's perfect. Please confirm my ticket with Southwest airline.

ASSISTANT: Sure. Your ticket is confirmed. The flight number is 1014.

USER: OK, thank you for your immediate response.

ASSISTANT: Thank you.