You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I want to go to oracle arena where my brother is staying. For this I want to book a ticket to Oakland. Can you please help me in booking a ticket?

ASSISTANT: Sure, May I know the journey dates?

USER: I would like to start on 07/07 and need to return on 07/09.

ASSISTANT: Please help me with your travel codes.

USER: My source is at PA-PHL and destination is at CA-OAK.

ASSISTANT: Can I get your name?

USER: I am Charles Adams.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, I will try with another airline.

ASSISTANT: Thank you for reaching us.

USER: Thank you.