You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to travel from SFO to DCA, can you please book the flight ticket for me?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: My trip dates are in May from 21st to 23rd.

ASSISTANT: Do you have any lay by in between journey?

USER: Yes, I prefer a lay by in between my journey.

ASSISTANT: Is there any other specifications for you?

USER: No, thanks for asking.

ASSISTANT: May I know your good name?

USER: I am Carolyn Clark.

ASSISTANT: We found a connecting flight in United Airlines with a fare of 100 which departs at 12:00 and return at 16:00. Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1010.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.