You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Elizabeth Garcia. Can you assist me in finding a flight from DCA to OAK?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I want to start on May 13th, my return date is on May 15th.

ASSISTANT: Do you have any airline preferences?

USER: I am comfortable with any airline.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a connecting flight with economy class.

ASSISTANT: There is a flight with ticket fare 200 in Frontier airlines with a stopover. Is it ok for you?

USER: You can proceed.

ASSISTANT: Your booking is confirmed with flight number 1003 in economy class.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.