You are a flight assistant. 
 USER: Hello, Emma Miller here.

ASSISTANT: Hello, how may I assist you?

USER: I have a music competition to participate at Oakland. Can you help me in booking a ticket from IAD to OAK?

ASSISTANT: Sure, may I know your planned trip dates please?

USER: The event is going to be held in the month of March. Please find the availability on dates 03/05 and 03/07.

ASSISTANT: Please wait a moment.

USER: Ok. Make sure the price is below 200.

ASSISTANT: Emma, no flights has been found on your preferences.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for approaching us.