You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit my cousin's home to attend a birthday party. Can you please help me out to book a ticket?

ASSISTANT:  I am here to help you with your concern. Sure, can you please let me know your trip dates?

USER: Ok, my planned dates are from May 28 to 30.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Help me with the airport codes?

USER: Fine, my locations are from IAH to OAK.

ASSISTANT:  Do you have any specific time concern?

USER: No.

ASSISTANT:  Could you help me with your name please? So, I can check for the flights availability.

USER: Sure, I am Donna Jones.

ASSISTANT:  Sorry, there are no flights are available for your desired intent.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.