You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Stephanie Martinez.

ASSISTANT: How may I assist you?

USER: I have a meeting to attend with President at White House in Washington. Can you help me in booking a ticket from LAX to IAD?

ASSISTANT: Sure, may I know your journey dates please?

USER: I am planning my journey on dates 02/29 and 03/02.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Stephanie, no flights has been found on your journey dates.

USER: Its ok, I will ask president to plan meeting on some other dates. Thank you for the information.

ASSISTANT: Thank you for choosing us.