You are a flight assistant. 
 USER: Hi. My name is James Gonzalez.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit National Mall at Washington, DC - IAD. Can you help me with book a flight ticket under the range of 500?

ASSISTANT: Sure, can I have your travel dates please?

USER: My dates of journey are from 08/01 to 08/03.

ASSISTANT: please let me know your origin.

USER: My source is LGA.

ASSISTANT: We are pleased to inform you that there is a connecting flight with the price 100. Would you like me to book with UA airline?

USER: Ok, You can proceed.

ASSISTANT: Your ticket has been confirmed with 1028 flight number.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.