You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to attend a Dance competition which is conducting in Atlanta, so can you help me in booking a flight ticket?

ASSISTANT: Can you please provide your airport codes of travelling?

USER: The airport codes are DTW and ATL.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: I am willing to travel in these dates 09/09 and 09/11.

ASSISTANT: Meanwhile, please provide your name.

USER: Sure, my name is Stephanie Carter.

ASSISTANT: Stephanie Carter, there are no flights available on your provided dates due to heavy bookings.

USER: Oh! That's fine, thank you for the information.

ASSISTANT: Thank you for contacting us.