You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to attend music concert at IAD, can you please help me with booking a flight ticket from OAK?

ASSISTANT: Sure, can I know your trip dates?

USER: I would like to take off on Feb 9 and return on Feb 11.

ASSISTANT: Do you have any specifications?

USER: I am looking for a connecting flight.

ASSISTANT: Can I know your good name?

USER: My name is Charles Young.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.