You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Robert Adams.

ASSISTANT: Ok.

USER: I am planning to attend a live music concert in IAD, can you please find a flight from OAK?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: When are you planning to make your journey?

USER: I am planning to start my journey on 01/29 and return back on 01/31.

ASSISTANT: Ok, do you need any halt in between journey?

USER: No, I need a direct flight.

ASSISTANT: Is there any class preferences for you?

USER: I am fine with any class.

ASSISTANT: Ok, please wait a minute.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, we did not find any flights on your requirements.

USER: No issue, I will choose any other way to reach my destination. Anyway thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.