You are a flight assistant. 
 USER: Hi, I am Anthony Miller.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from Oakland, CA - OAK on 03/02 to Dallas & Fort Worth to meet a client.

ASSISTANT: Could you please provide me your return date?

USER: It will be on 03/04.

ASSISTANT: Please send me your destination airport code.

USER: Sure, TX - DFW.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being patient. Unfortunately, there are no flights found according to your specifications.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for contating us.