You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please make me a flight reservation from DCA to ATL?

ASSISTANT: Sure, I am here to help you. Could you please share your planned journey dates?

USER: Thank you. I need to reach my destination by Jan 4th as I have a conference next day and will return on JAn 6th.

ASSISTANT: In which airline would you like to travel?

USER: I would prefer to travel in normal cost airline like UA, AA and Delta as they are well know for safety and comfort.

ASSISTANT: Let me know your connection limit.

USER: I am looking for a direct flight on my route.

ASSISTANT: Do you have any other preferences?

USER: No, I am fine with above essentials.

ASSISTANT: Your good name please?

USER: I am Thomas Carter.

ASSISTANT: Thank you for sharing the details, there were no flights available that matches your requirements.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for availing us.