You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you please help me to book a flight?

ASSISTANT: Sure, may I know your airport codes?

USER: I want to board from LAX to reach DCA.

ASSISTANT: Ok, please tell me your class preference?

USER: I don't have any class preference.

ASSISTANT: Ok, do you need any break in between the journey?

USER: Anything is fine with me.

ASSISTANT: Can I have your travelling dates please?

USER: I will be travelling on Mar 7th and 9th.

ASSISTANT: May I know your good name please?

USER: My name is Katherine Young.

ASSISTANT: We found a 1017 Spirit airlines with fare of 700 matches your schedule.

USER: It looks prefect, please proceed.

ASSISTANT: Your ticket has been confirmed with business class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.