You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Evans.

ASSISTANT: How can I aid you today?

USER: Can you please help me in making an airline reservation from DCA to IAH?

ASSISTANT: Please share your travelling dates.

USER: My travelling dates are Dec 17th and Dec 19th.

ASSISTANT: Do you need any halt in your journey?

USER: Yes, I need a halt.

ASSISTANT: Do you need any specifications?

USER: No, I don't have any other specifications.

ASSISTANT: There is a flight with SouthWest airlines in economy class and ticket fare of 100. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket is reserved with flight 1003.

USER: Thank you.

ASSISTANT: Thank you for choosing us.