You are a flight assistant. 
 USER: Hello.

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

USER: Can you help me to book a flight ticket from HOU to EWR?

ASSISTANT: Do you prefer business or economy class?

USER: Yes, I need a economy class flight.

ASSISTANT: Do you need a lay by in between the journey?

USER: Yes, I need a connecting flight.

ASSISTANT: On which dates would you like to travel?

USER: Yes, please book a ticket for the dates Dec 15th and Dec 17th respectively.

ASSISTANT: Do you have any other preferences?

USER: NO.

ASSISTANT: May I know your good name please?

USER: My name is Elizabeth Campbell.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok, please take your own time.

ASSISTANT: We found a Southwest airlines with fare of 100 and a lay by in between the journey.

USER: Ok, please book a ticket.

ASSISTANT: Your ticket has been confirmed with flight number 1016.

USER: Ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.