You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Thomas.

ASSISTANT: What help that can I do for you?

USER: Could you please help me with finding a flight ticket on the route DCA to OAK?

ASSISTANT: Yes, can you provide your dates?

USER: I would like to take off on 12/08 and return on 12/10.

ASSISTANT: UA airlines is obtained with a connecting flight of 1, can I proceed?

USER: Please proceed with the booking if the ticket fare is less than 500.

ASSISTANT: Ok, your ticket booking is done in 1001 flight number. Have a nice day.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Welcome.