You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best I can assist you at this moment?

USER: I would like to travel from MSP to OAK for my office work, can you please book my flight ticket?

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

USER: I have to depart on Jan 13th and return on Jan 15th.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a flight with single connection.

ASSISTANT: Please let me know your class preference.

USER: I prefer for an economy class.

ASSISTANT: Is there any more specifications to be met?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Eric Johnson.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available matching your requirements.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for availing us.