You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Emily Gonzalez.

ASSISTANT: How may I assist you?

USER: Could you do me a favour in making my reservation from LGA to DCA?

ASSISTANT: Sure, I am here to help you with that. Can you help me with your planned journey dates?

USER: Sure, my planned journey dates are from 12/06 to 12/08.

ASSISTANT: Sorry, there is no flight as per your details.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.