You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Johnson.

ASSISTANT: How can I assist you today?

USER: I am planning to go for a small trip to Los Angeles, CA - LAX with my friends. Can you please book a ticket for me on 12/04?

ASSISTANT: Sure, will you mention your source airport code please?

USER: Ok, Washington DC - DCA is my source airport.

ASSISTANT: Please mention your return date.

USER: 12/06 is my return date.

ASSISTANT: Please give me a moment.

USER: OK.

ASSISTANT: There is a flight with price 300 and the connections 1 is available. Shall I confirm your ticket?

USER: Sorry, my budget is up-to 200 only. Please check under 200.

ASSISTANT: There is no flights found under your price.

USER: Ok, no problem. Thanks for the response.

ASSISTANT: Welcome, have a great day.