You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to celebrate my birthday at Washington, please help me in booking a ticket from SFO to IAD.

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: My planned travel dates are on Nov 25 and Nov 27.

ASSISTANT: May I know your price limit?

USER: My budget for this trip is 500.

ASSISTANT: There is a connecting flight 1000 with price 100, can I proceed?

USER: Ok, please book the ticket with the name Gary Johnson.

ASSISTANT: Your booking is done with Frontier airlines.

USER: Thank you for your help.

ASSISTANT: You are welcome.