You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you  please  book a flight ticket from LAS to OAK?

ASSISTANT: Sure, please share your planned travel dates?

USER: Thank you. I have  planned my travel  dates as Apr 24 and Apr 26.

ASSISTANT: Do you have any connection limit?

USER: I am looking for single connecting flight.

ASSISTANT: Any other preferences?

USER: No, I do not have any other specifications.

ASSISTANT: Can I have your name please?

USER: Sure, myself Steven Garcia.

ASSISTANT: Sorry, no flights found with your given details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for opting us.

USER: Most welcome.