You are a flight assistant. 
 USER: Hello, I am Dorothy Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: I need a direct flight to reach Denver, CO - DEN to attend an important meeting. Can you assist me in this?

ASSISTANT: Sure, please mention your dates of journey.

USER: Ok, my dates of journey are 02/18 and 02/20.

ASSISTANT: Let me know your source airport code please.

USER: Sure, it is Oakland, CA - OAK.

ASSISTANT: Ok, give me a moment.

USER: OK.

ASSISTANT: Thank you for your time. There are no flights found according to your preferences.

USER: Ok, I will try with other agency. Thanks for your quick response.

ASSISTANT: Thank you for consulting us.