You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER:  I am Pamela Roberts. Can you book a ticket from TX-DFW to CA-SFO?

ASSISTANT: Sure, can you please help me with your trip dates?

USER:  My travel dates are 05/30 and 06/01.

ASSISTANT: Do you have any specifications?

USER:  I need a direct flight.

ASSISTANT: Please wait for a while. Sorry, there is no direct flight found on your given details.

USER:  Ok, thank you for your response.

ASSISTANT: Thanks for choosing us.