You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I have to attend a Live Concert at San Francisco, could you please help me with booking a flight ticket from IAD to SFO?

ASSISTANT: Sure, may I know the planned travel dates?

USER: I would like to depart on Dec 11th and return on Dec 13th.

ASSISTANT: Please provide me the specifications.

USER: I am looking for a connecting flight.

ASSISTANT: May I know the name?

USER: I am Larry Hernandez.

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

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.