You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ashley Robinson here.

ASSISTANT: How may I serve you at this moment?

USER: I need your help in booking of a flight ticket from DCA to OAK for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, on which dates would you like to travel?

USER: My departure is on May 18 and please book my return ticket also on May 20.

ASSISTANT: Ok, how much you can afford for a flight ticket?

USER: I can afford up to 500 for my journey.

ASSISTANT: We found a AA airline with fare of 100 and a halt in between the journey matches your schedule. Shall I proceed with booking?

USER: I am ok with this flight, you can proceed with booking now.

ASSISTANT: Your ticket has been confirmed with flight number 1002.

USER: Thank you for your great help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.